The structure described by Nd2Ce2O7 crystallizes in the triclinic P1 space group. There are eight inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to one O(1), one O(16), one O(17), one O(19), one O(22), and one O(23) atom. In the second Nd site, Nd(2) is bonded to one O(15), one O(16), one O(19), one O(21), one O(3), one O(6), and one O(7) atom to form distorted NdO7 hexagonal pyramids that share  an edgeedge with one Ce(8)O7 hexagonal pyramid. In the third Nd site, Nd(3) is bonded in a 5-coordinate geometry to one O(2), one O(23), one O(24), one O(27), and one O(3) atom. In the fourth Nd site, Nd(4) is bonded in a 7-coordinate geometry to one O(12), one O(19), one O(20), one O(25), one O(28), one O(5), and one O(6) atom. In the fifth Nd site, Nd(5) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(14), one O(2), and one O(4) atom. In the sixth Nd site, Nd(6) is bonded in a 6-coordinate geometry to one O(1), one O(18), one O(28), one O(4), one O(6), and one O(9) atom. In the seventh Nd site, Nd(7) is bonded in a 6-coordinate geometry to one O(15), one O(20), one O(21), one O(22), one O(26), and one O(27) atom. In the eighth Nd site, Nd(8) is bonded in a 7-coordinate geometry to one O(10), one O(13), one O(22), one O(24), one O(25), one O(26), and one O(28) atom. There are eight inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a body-centered cubic geometry to one O(10), one O(12), one O(13), one O(16), one O(2), one O(23), one O(5), and one O(7) atom. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(15), one O(18), one O(2), one O(20), and one O(25) atom. In the third Ce site, Ce(3) is bonded in a body-centered cubic geometry to one O(11), one O(13), one O(15), one O(17), one O(22), one O(4), one O(7), and one O(9) atom. In the fourth Ce site, Ce(4) is bonded in a body-centered cubic geometry to one O(12), one O(13), one O(14), one O(21), one O(24), one O(27), one O(6), and one O(9) atom. In the fifth Ce site, Ce(5) is bonded in a body-centered cubic geometry to one O(11), one O(14), one O(17), one O(19), one O(24), one O(25), one O(3), and one O(8) atom. In the sixth Ce site, Ce(6) is bonded in a body-centered cubic geometry to one O(1), one O(10), one O(14), one O(16), one O(18), one O(21), one O(26), and one O(8) atom. In the seventh Ce site, Ce(7) is bonded in a body-centered cubic geometry to one O(17), one O(18), one O(20), one O(23), one O(27), one O(5), one O(8), and one O(9) atom. In the eighth Ce site, Ce(8) is bonded to one O(26), one O(28), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form distorted CeO7 hexagonal pyramids that share  an edgeedge with one Nd(2)O7 hexagonal pyramid. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded to one Nd(1), one Nd(5), one Nd(6), and one Ce(6) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra, and  an edgeedge with one O(18)Ce3Nd tetrahedra. In the second O site, O(2) is bonded to one Nd(3), one Nd(5), one Ce(1), and one Ce(2) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra, and  an edgeedge with one O(11)Ce3Nd tetrahedra. In the third O site, O(3) is bonded to one Nd(2), one Nd(3), one Ce(5), and one Ce(8) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra, and  an edgeedge with one O(19)CeNd3 tetrahedra. In the fourth O site, O(4) is bonded to one Nd(5), one Nd(6), one Ce(3), and one Ce(8) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra,  an edgeedge with one O(1)CeNd3 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the fifth O site, O(5) is bonded to one Nd(4), one Ce(1), one Ce(7), and one Ce(8) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the sixth O site, O(6) is bonded to one Nd(2), one Nd(4), one Nd(6), and one Ce(4) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra,  an edgeedge with one O(19)CeNd3 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the seventh O site, O(7) is bonded to one Nd(2), one Ce(1), one Ce(3), and one Ce(8) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(3)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra, and  an edgeedge with one O(5)Ce3Nd tetrahedra. In the eighth O site, O(8) is bonded to one Ce(5), one Ce(6), one Ce(7), and one Ce(8) atom to form OCe4 tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(3)Ce2Nd2 tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra,  an edgeedge with one O(17)Ce3Nd tetrahedra,  an edgeedge with one O(18)Ce3Nd tetrahedra, and  an edgeedge with one O(5)Ce3Nd tetrahedra. In the ninth O site, O(9) is bonded to one Nd(6), one Ce(3), one Ce(4), and one Ce(7) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra,  an edgeedge with one O(17)Ce3Nd tetrahedra,  an edgeedge with one O(18)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. In the tenth O site, O(10) is bonded to one Nd(8), one Ce(1), one Ce(2), and one Ce(6) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(2)Ce2Nd2 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra, and  an edgeedge with one O(18)Ce3Nd tetrahedra. In the eleventh O site, O(11) is bonded to one Nd(5), one Ce(2), one Ce(3), and one Ce(5) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(2)Ce2Nd2 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra, and  an edgeedge with one O(17)Ce3Nd tetrahedra. In the twelfth O site, O(12) is bonded to one Nd(4), one Nd(5), one Ce(1), and one Ce(4) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(2)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra,  an edgeedge with one O(5)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. In the thirteenth O site, O(13) is bonded to one Nd(8), one Ce(1), one Ce(3), and one Ce(4) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra, and  an edgeedge with one O(22)CeNd3 tetrahedra. In the fourteenth O site, O(14) is bonded to one Nd(5), one Ce(4), one Ce(5), and one Ce(6) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra, and  an edgeedge with one O(1)CeNd3 tetrahedra. In the fifteenth O site, O(15) is bonded to one Nd(2), one Nd(7), one Ce(2), and one Ce(3) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra, and  an edgeedge with one O(22)CeNd3 tetrahedra. In the sixteenth O site, O(16) is bonded to one Nd(1), one Nd(2), one Ce(1), and one Ce(6) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(1)CeNd3 tetrahedra, and  an edgeedge with one O(19)CeNd3 tetrahedra. In the seventeenth O site, O(17) is bonded to one Nd(1), one Ce(3), one Ce(5), and one Ce(7) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra,  an edgeedge with one O(19)CeNd3 tetrahedra, and  an edgeedge with one O(22)CeNd3 tetrahedra. In the eighteenth O site, O(18) is bonded to one Nd(6), one Ce(2), one Ce(6), and one Ce(7) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra, and  an edgeedge with one O(1)CeNd3 tetrahedra. In the nineteenth O site, O(19) is bonded to one Nd(1), one Nd(2), one Nd(4), and one Ce(5) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(3)Ce2Nd2 tetrahedra,  an edgeedge with one O(17)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. In the twentieth O site, O(20) is bonded to one Nd(4), one Nd(7), one Ce(2), and one Ce(7) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(18)Ce3Nd tetrahedra, and  an edgeedge with one O(5)Ce3Nd tetrahedra. In the twenty-first O site, O(21) is bonded to one Nd(2), one Nd(7), one Ce(4), and one Ce(6) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. In the twenty-second O site, O(22) is bonded to one Nd(1), one Nd(7), one Nd(8), and one Ce(3) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra, and  an edgeedge with one O(17)Ce3Nd tetrahedra. In the twenty-third O site, O(23) is bonded to one Nd(1), one Nd(3), one Ce(1), and one Ce(7) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(2)Ce2Nd2 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(17)Ce3Nd tetrahedra, and  an edgeedge with one O(5)Ce3Nd tetrahedra. In the twenty-fourth O site, O(24) is bonded to one Nd(3), one Nd(8), one Ce(4), and one Ce(5) atom to form distorted OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(3)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra, and  an edgeedge with one O(14)Ce3Nd tetrahedra. In the twenty-fifth O site, O(25) is bonded to one Nd(4), one Nd(8), one Ce(2), and one Ce(5) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(19)CeNd3 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the twenty-sixth O site, O(26) is bonded to one Nd(7), one Nd(8), one Ce(6), and one Ce(8) atom to form distorted OCe2Nd2 tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra,  an edgeedge with one O(22)CeNd3 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the twenty-seventh O site, O(27) is bonded to one Nd(3), one Nd(7), one Ce(4), and one Ce(7) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra, and  an edgeedge with one O(9)Ce3Nd tetrahedra. In the twenty-eighth O site, O(28) is bonded to one Nd(4), one Nd(6), one Nd(8), and one Ce(8) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(5)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. is represented by the CIF card [CIF]
data_Ce2Nd2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.574
_cell_length_b   9.588
_cell_length_c   9.669
_cell_angle_alpha   109.248
_cell_angle_beta   109.808
_cell_angle_gamma   108.977
_symmetry_Int_Tables_number   1
_cell_volume   686.379
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ce  Ce0  1  0.249  0.251  0.994  1.0
  Ce  Ce1  1  0.526  0.273  0.770  1.0
  Ce  Ce2  1  0.499  0.495  0.496  1.0
  Ce  Ce3  1  0.494  0.745  0.249  1.0
  Ce  Ce4  1  0.759  0.755  0.004  1.0
  Ce  Ce5  1  0.496  0.997  0.995  1.0
  Ce  Ce6  1  0.748  0.003  0.750  1.0
  Ce  Ce7  1  0.998  0.247  0.228  1.0
  Nd  Nd8  1  0.994  0.766  0.763  1.0
  Nd  Nd9  1  0.241  0.998  0.225  1.0
  Nd  Nd10  1  0.973  0.008  0.495  1.0
  Nd  Nd11  1  0.006  0.511  0.029  1.0
  Nd  Nd12  1  0.295  0.519  0.773  1.0
  Nd  Nd13  1  0.270  0.725  0.504  1.0
  Nd  Nd14  1  0.699  0.230  0.479  1.0
  Nd  Nd15  1  0.734  0.479  0.242  1.0
  O  O16  1  0.234  0.738  0.746  1.0
  O  O17  1  0.254  0.241  0.726  1.0
  O  O18  1  0.000  0.018  0.261  1.0
  O  O19  1  0.246  0.471  0.496  1.0
  O  O20  1  0.996  0.241  0.993  1.0
  O  O21  1  0.265  0.770  0.276  1.0
  O  O22  1  0.249  0.257  0.235  1.0
  O  O23  1  0.741  0.007  0.990  1.0
  O  O24  1  0.510  0.738  0.498  1.0
  O  O25  1  0.503  0.241  0.998  1.0
  O  O26  1  0.527  0.514  0.758  1.0
  O  O27  1  0.243  0.505  0.992  1.0
  O  O28  1  0.483  0.493  0.237  1.0
  O  O29  1  0.525  0.758  0.015  1.0
  O  O30  1  0.468  0.233  0.498  1.0
  O  O31  1  0.254  0.013  0.995  1.0
  O  O32  1  0.747  0.768  0.763  1.0
  O  O33  1  0.493  0.006  0.731  1.0
  O  O34  1  0.993  0.741  0.989  1.0
  O  O35  1  0.762  0.275  0.757  1.0
  O  O36  1  0.486  0.986  0.225  1.0
  O  O37  1  0.753  0.506  0.512  1.0
  O  O38  1  0.994  0.994  0.737  1.0
  O  O39  1  0.769  0.748  0.281  1.0
  O  O40  1  0.744  0.507  0.006  1.0
  O  O41  1  0.774  0.237  0.268  1.0
  O  O42  1  0.742  0.009  0.497  1.0
  O  O43  1  0.002  0.504  0.266  1.0
[/CIF]
.
The structure described by Nd2Ce2O7 crystallizes in the triclinic P1 space group. There are eight inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to one O(1), one O(16), one O(17), one O(19), one O(22), and one O(23) atom. In the second Nd site, Nd(2) is bonded to one O(15), one O(16), one O(19), one O(21), one O(3), one O(6), and one O(7) atom to form distorted NdO7 hexagonal pyramids that share  an edgeedge with one Ce(8)O7 hexagonal pyramid. In the third Nd site, Nd(3) is bonded in a 5-coordinate geometry to one O(2), one O(23), one O(24), one O(27), and one O(3) atom. In the fourth Nd site, Nd(4) is bonded in a 7-coordinate geometry to one O(12), one O(19), one O(20), one O(25), one O(28), one O(5), and one O(6) atom. In the fifth Nd site, Nd(5) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(14), one O(2), and one O(4) atom. In the sixth Nd site, Nd(6) is bonded in a 6-coordinate geometry to one O(1), one O(18), one O(28), one O(4), one O(6), and one O(9) atom. In the seventh Nd site, Nd(7) is bonded in a 6-coordinate geometry to one O(15), one O(20), one O(21), one O(22), one O(26), and one O(27) atom. In the eighth Nd site, Nd(8) is bonded in a 7-coordinate geometry to one O(10), one O(13), one O(22), one O(24), one O(25), one O(26), and one O(28) atom. There are eight inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a body-centered cubic geometry to one O(10), one O(12), one O(13), one O(16), one O(2), one O(23), one O(5), and one O(7) atom. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(15), one O(18), one O(2), one O(20), and one O(25) atom. In the third Ce site, Ce(3) is bonded in a body-centered cubic geometry to one O(11), one O(13), one O(15), one O(17), one O(22), one O(4), one O(7), and one O(9) atom. In the fourth Ce site, Ce(4) is bonded in a body-centered cubic geometry to one O(12), one O(13), one O(14), one O(21), one O(24), one O(27), one O(6), and one O(9) atom. In the fifth Ce site, Ce(5) is bonded in a body-centered cubic geometry to one O(11), one O(14), one O(17), one O(19), one O(24), one O(25), one O(3), and one O(8) atom. In the sixth Ce site, Ce(6) is bonded in a body-centered cubic geometry to one O(1), one O(10), one O(14), one O(16), one O(18), one O(21), one O(26), and one O(8) atom. In the seventh Ce site, Ce(7) is bonded in a body-centered cubic geometry to one O(17), one O(18), one O(20), one O(23), one O(27), one O(5), one O(8), and one O(9) atom. In the eighth Ce site, Ce(8) is bonded to one O(26), one O(28), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form distorted CeO7 hexagonal pyramids that share  an edgeedge with one Nd(2)O7 hexagonal pyramid. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded to one Nd(1), one Nd(5), one Nd(6), and one Ce(6) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra, and  an edgeedge with one O(18)Ce3Nd tetrahedra. In the second O site, O(2) is bonded to one Nd(3), one Nd(5), one Ce(1), and one Ce(2) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra, and  an edgeedge with one O(11)Ce3Nd tetrahedra. In the third O site, O(3) is bonded to one Nd(2), one Nd(3), one Ce(5), and one Ce(8) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra, and  an edgeedge with one O(19)CeNd3 tetrahedra. In the fourth O site, O(4) is bonded to one Nd(5), one Nd(6), one Ce(3), and one Ce(8) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra,  an edgeedge with one O(1)CeNd3 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the fifth O site, O(5) is bonded to one Nd(4), one Ce(1), one Ce(7), and one Ce(8) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the sixth O site, O(6) is bonded to one Nd(2), one Nd(4), one Nd(6), and one Ce(4) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra,  an edgeedge with one O(19)CeNd3 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the seventh O site, O(7) is bonded to one Nd(2), one Ce(1), one Ce(3), and one Ce(8) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(3)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra, and  an edgeedge with one O(5)Ce3Nd tetrahedra. In the eighth O site, O(8) is bonded to one Ce(5), one Ce(6), one Ce(7), and one Ce(8) atom to form OCe4 tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(3)Ce2Nd2 tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra,  an edgeedge with one O(17)Ce3Nd tetrahedra,  an edgeedge with one O(18)Ce3Nd tetrahedra, and  an edgeedge with one O(5)Ce3Nd tetrahedra. In the ninth O site, O(9) is bonded to one Nd(6), one Ce(3), one Ce(4), and one Ce(7) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra,  an edgeedge with one O(17)Ce3Nd tetrahedra,  an edgeedge with one O(18)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. In the tenth O site, O(10) is bonded to one Nd(8), one Ce(1), one Ce(2), and one Ce(6) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(2)Ce2Nd2 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra, and  an edgeedge with one O(18)Ce3Nd tetrahedra. In the eleventh O site, O(11) is bonded to one Nd(5), one Ce(2), one Ce(3), and one Ce(5) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(2)Ce2Nd2 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra, and  an edgeedge with one O(17)Ce3Nd tetrahedra. In the twelfth O site, O(12) is bonded to one Nd(4), one Nd(5), one Ce(1), and one Ce(4) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(2)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra,  an edgeedge with one O(5)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. In the thirteenth O site, O(13) is bonded to one Nd(8), one Ce(1), one Ce(3), and one Ce(4) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra, and  an edgeedge with one O(22)CeNd3 tetrahedra. In the fourteenth O site, O(14) is bonded to one Nd(5), one Ce(4), one Ce(5), and one Ce(6) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(12)Ce2Nd2 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra, and  an edgeedge with one O(1)CeNd3 tetrahedra. In the fifteenth O site, O(15) is bonded to one Nd(2), one Nd(7), one Ce(2), and one Ce(3) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra, and  an edgeedge with one O(22)CeNd3 tetrahedra. In the sixteenth O site, O(16) is bonded to one Nd(1), one Nd(2), one Ce(1), and one Ce(6) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(7)Ce3Nd tetrahedra,  an edgeedge with one O(1)CeNd3 tetrahedra, and  an edgeedge with one O(19)CeNd3 tetrahedra. In the seventeenth O site, O(17) is bonded to one Nd(1), one Ce(3), one Ce(5), and one Ce(7) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra,  an edgeedge with one O(19)CeNd3 tetrahedra, and  an edgeedge with one O(22)CeNd3 tetrahedra. In the eighteenth O site, O(18) is bonded to one Nd(6), one Ce(2), one Ce(6), and one Ce(7) atom to form OCe3Nd tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(9)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra, and  an edgeedge with one O(1)CeNd3 tetrahedra. In the nineteenth O site, O(19) is bonded to one Nd(1), one Nd(2), one Nd(4), and one Ce(5) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(3)Ce2Nd2 tetrahedra,  an edgeedge with one O(17)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. In the twentieth O site, O(20) is bonded to one Nd(4), one Nd(7), one Ce(2), and one Ce(7) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(18)Ce3Nd tetrahedra, and  an edgeedge with one O(5)Ce3Nd tetrahedra. In the twenty-first O site, O(21) is bonded to one Nd(2), one Nd(7), one Ce(4), and one Ce(6) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(14)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. In the twenty-second O site, O(22) is bonded to one Nd(1), one Nd(7), one Nd(8), and one Ce(3) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  an edgeedge with one O(15)Ce2Nd2 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra, and  an edgeedge with one O(17)Ce3Nd tetrahedra. In the twenty-third O site, O(23) is bonded to one Nd(1), one Nd(3), one Ce(1), and one Ce(7) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  an edgeedge with one O(16)Ce2Nd2 tetrahedra,  an edgeedge with one O(2)Ce2Nd2 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(17)Ce3Nd tetrahedra, and  an edgeedge with one O(5)Ce3Nd tetrahedra. In the twenty-fourth O site, O(24) is bonded to one Nd(3), one Nd(8), one Ce(4), and one Ce(5) atom to form distorted OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(21)Ce2Nd2 tetrahedra,  a cornercorner with one O(23)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(11)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(28)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(27)Ce2Nd2 tetrahedra,  an edgeedge with one O(3)Ce2Nd2 tetrahedra,  an edgeedge with one O(13)Ce3Nd tetrahedra, and  an edgeedge with one O(14)Ce3Nd tetrahedra. In the twenty-fifth O site, O(25) is bonded to one Nd(4), one Nd(8), one Ce(2), and one Ce(5) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(11)Ce3Nd tetrahedra,  an edgeedge with one O(19)CeNd3 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the twenty-sixth O site, O(26) is bonded to one Nd(7), one Nd(8), one Ce(6), and one Ce(8) atom to form distorted OCe2Nd2 tetrahedra that share  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(16)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(25)Ce2Nd2 tetrahedra,  a cornercorner with one O(27)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(4)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(10)Ce3Nd tetrahedra,  an edgeedge with one O(8)Ce4 tetrahedra,  an edgeedge with one O(22)CeNd3 tetrahedra, and  an edgeedge with one O(28)CeNd3 tetrahedra. In the twenty-seventh O site, O(27) is bonded to one Nd(3), one Nd(7), one Ce(4), and one Ce(7) atom to form OCe2Nd2 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(15)Ce2Nd2 tetrahedra,  a cornercorner with one O(2)Ce2Nd2 tetrahedra,  a cornercorner with one O(26)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(14)Ce3Nd tetrahedra,  a cornercorner with one O(17)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(5)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  a cornercorner with one O(6)CeNd3 tetrahedra,  an edgeedge with one O(20)Ce2Nd2 tetrahedra,  an edgeedge with one O(21)Ce2Nd2 tetrahedra,  an edgeedge with one O(23)Ce2Nd2 tetrahedra,  an edgeedge with one O(24)Ce2Nd2 tetrahedra, and  an edgeedge with one O(9)Ce3Nd tetrahedra. In the twenty-eighth O site, O(28) is bonded to one Nd(4), one Nd(6), one Nd(8), and one Ce(8) atom to form OCeNd3 tetrahedra that share  a cornercorner with one O(12)Ce2Nd2 tetrahedra,  a cornercorner with one O(20)Ce2Nd2 tetrahedra,  a cornercorner with one O(24)Ce2Nd2 tetrahedra,  a cornercorner with one O(3)Ce2Nd2 tetrahedra,  a cornercorner with one O(10)Ce3Nd tetrahedra,  a cornercorner with one O(13)Ce3Nd tetrahedra,  a cornercorner with one O(18)Ce3Nd tetrahedra,  a cornercorner with one O(7)Ce3Nd tetrahedra,  a cornercorner with one O(9)Ce3Nd tetrahedra,  a cornercorner with one O(8)Ce4 tetrahedra,  a cornercorner with one O(1)CeNd3 tetrahedra,  a cornercorner with one O(19)CeNd3 tetrahedra,  a cornercorner with one O(22)CeNd3 tetrahedra,  an edgeedge with one O(25)Ce2Nd2 tetrahedra,  an edgeedge with one O(26)Ce2Nd2 tetrahedra,  an edgeedge with one O(4)Ce2Nd2 tetrahedra,  an edgeedge with one O(5)Ce3Nd tetrahedra, and  an edgeedge with one O(6)CeNd3 tetrahedra. is represented by the CIF card [CIF]
data_Ce2Nd2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.574
_cell_length_b   9.588
_cell_length_c   9.669
_cell_angle_alpha   109.248
_cell_angle_beta   109.808
_cell_angle_gamma   108.977
_symmetry_Int_Tables_number   1
_cell_volume   686.379
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ce  Ce0  1  0.249  0.251  0.994  1.0
  Ce  Ce1  1  0.526  0.273  0.770  1.0
  Ce  Ce2  1  0.499  0.495  0.496  1.0
  Ce  Ce3  1  0.494  0.745  0.249  1.0
  Ce  Ce4  1  0.759  0.755  0.004  1.0
  Ce  Ce5  1  0.496  0.997  0.995  1.0
  Ce  Ce6  1  0.748  0.003  0.750  1.0
  Ce  Ce7  1  0.998  0.247  0.228  1.0
  Nd  Nd8  1  0.994  0.766  0.763  1.0
  Nd  Nd9  1  0.241  0.998  0.225  1.0
  Nd  Nd10  1  0.973  0.008  0.495  1.0
  Nd  Nd11  1  0.006  0.511  0.029  1.0
  Nd  Nd12  1  0.295  0.519  0.773  1.0
  Nd  Nd13  1  0.270  0.725  0.504  1.0
  Nd  Nd14  1  0.699  0.230  0.479  1.0
  Nd  Nd15  1  0.734  0.479  0.242  1.0
  O  O16  1  0.234  0.738  0.746  1.0
  O  O17  1  0.254  0.241  0.726  1.0
  O  O18  1  0.000  0.018  0.261  1.0
  O  O19  1  0.246  0.471  0.496  1.0
  O  O20  1  0.996  0.241  0.993  1.0
  O  O21  1  0.265  0.770  0.276  1.0
  O  O22  1  0.249  0.257  0.235  1.0
  O  O23  1  0.741  0.007  0.990  1.0
  O  O24  1  0.510  0.738  0.498  1.0
  O  O25  1  0.503  0.241  0.998  1.0
  O  O26  1  0.527  0.514  0.758  1.0
  O  O27  1  0.243  0.505  0.992  1.0
  O  O28  1  0.483  0.493  0.237  1.0
  O  O29  1  0.525  0.758  0.015  1.0
  O  O30  1  0.468  0.233  0.498  1.0
  O  O31  1  0.254  0.013  0.995  1.0
  O  O32  1  0.747  0.768  0.763  1.0
  O  O33  1  0.493  0.006  0.731  1.0
  O  O34  1  0.993  0.741  0.989  1.0
  O  O35  1  0.762  0.275  0.757  1.0
  O  O36  1  0.486  0.986  0.225  1.0
  O  O37  1  0.753  0.506  0.512  1.0
  O  O38  1  0.994  0.994  0.737  1.0
  O  O39  1  0.769  0.748  0.281  1.0
  O  O40  1  0.744  0.507  0.006  1.0
  O  O41  1  0.774  0.237  0.268  1.0
  O  O42  1  0.742  0.009  0.497  1.0
  O  O43  1  0.002  0.504  0.266  1.0
[/CIF]
.