The compound described by Sm4Cr3Fe31C4 crystallizes in the triclinic P1 space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a distorted bent 120 degrees geometry to one Fe(1), one Fe(23), one Fe(27), one Fe(3), one Fe(6), one Fe(7), two equivalent Fe(13), one C(2), and one C(3) atom. In the second Sm site, Sm(2) is bonded in a distorted bent 120 degrees geometry to one Cr(1), one Fe(2), one Fe(24), one Fe(28), one Fe(4), one Fe(5), one Fe(8), two equivalent Fe(14), one C(1), and one C(4) atom. In the third Sm site, Sm(3) is bonded in a distorted bent 120 degrees geometry to one Cr(2), one Fe(1), one Fe(13), one Fe(23), one Fe(27), one Fe(4), one Fe(5), two equivalent Fe(7), one C(1), and one C(3) atom. In the fourth Sm site, Sm(4) is bonded in a distorted bent 120 degrees geometry to one Cr(3), one Fe(14), one Fe(2), one Fe(24), one Fe(28), one Fe(3), one Fe(6), two equivalent Fe(8), one C(2), and one C(4) atom. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 14-coordinate geometry to one Sm(2), one Cr(2), one Fe(14), one Fe(15), one Fe(18), one Fe(2), one Fe(20), one Fe(21), one Fe(24), one Fe(26), one Fe(27), one Fe(29), one Fe(4), and one Fe(5) atom. In the second Cr site, Cr(2) is bonded in a 14-coordinate geometry to one Sm(3), one Cr(1), one Fe(1), one Fe(10), one Fe(11), one Fe(20), one Fe(21), one Fe(24), one Fe(26), one Fe(27), one Fe(29), one Fe(4), one Fe(5), and one Fe(7) atom. In the third Cr site, Cr(3) is bonded in a 14-coordinate geometry to one Sm(4), one Fe(12), one Fe(19), one Fe(2), one Fe(22), one Fe(23), one Fe(25), one Fe(28), one Fe(3), one Fe(30), one Fe(31), one Fe(6), one Fe(8), and one Fe(9) atom. There are thirty-one inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Sm(1), one Sm(3), one Cr(2), one Fe(11), one Fe(13), one Fe(17), one Fe(21), one Fe(23), one Fe(25), one Fe(27), one Fe(31), and one Fe(7) atom to form distorted FeSm2CrFe9 cuboctahedra that share  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(7)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(13)Sm3Fe9 cuboctahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent C(3)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 45-46°. In the second Fe site, Fe(2) is bonded to one Sm(2), one Sm(4), one Cr(1), one Cr(3), one Fe(12), one Fe(14), one Fe(18), one Fe(22), one Fe(24), one Fe(26), one Fe(28), and one Fe(8) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(14)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(8)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, and faces with two equivalent C(4)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 46-48°. In the third Fe site, Fe(3) is bonded to one Sm(1), one Sm(4), one Cr(3), one Fe(13), one Fe(16), one Fe(19), one Fe(23), one Fe(28), one Fe(30), one Fe(31), one Fe(8), and one Fe(9) atom to form distorted FeSm2CrFe9 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(3)Sm2Fe4 octahedra,  a cornercorner with one C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(14)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent C(2)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 45-48°. In the fourth Fe site, Fe(4) is bonded to one Sm(2), one Sm(3), one Cr(1), one Cr(2), one Fe(10), one Fe(14), one Fe(15), one Fe(20), one Fe(24), one Fe(27), one Fe(29), and one Fe(7) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one C(3)Sm2Fe4 octahedra,  a cornercorner with one C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(13)Sm3Fe9 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, and faces with two equivalent C(1)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles are 46°. In the fifth Fe site, Fe(5) is bonded to one Sm(2), one Sm(3), one Cr(1), one Cr(2), one Fe(10), one Fe(11), one Fe(15), one Fe(18), one Fe(20), one Fe(21), one Fe(26), and one Fe(29) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(4)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(8)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(13)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(14)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(24)Sm2Cr2Fe8 cuboctahedra, faces with two equivalent Fe(27)Sm2Cr2Fe8 cuboctahedra, faces with two equivalent Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one C(3)Sm2Fe4 octahedra,  a faceface with one C(4)Sm2Fe4 octahedra, and faces with two equivalent C(1)Sm2Fe4 octahedra. In the sixth Fe site, Fe(6) is bonded in a 12-coordinate geometry to one Sm(1), one Sm(4), one Cr(3), one Fe(12), one Fe(16), one Fe(17), one Fe(19), one Fe(22), one Fe(25), one Fe(30), one Fe(31), and one Fe(9) atom. In the seventh Fe site, Fe(7) is bonded to one Sm(1), two equivalent Sm(3), one Cr(2), one Fe(1), one Fe(15), one Fe(17), one Fe(21), one Fe(23), one Fe(27), one Fe(29), and one Fe(4) atom to form distorted FeSm3CrFe8 cuboctahedra that share  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(3)Sm2Fe4 octahedra,  an edgeedge with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(1)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(3)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(13)Sm3Fe9 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one C(1)Sm2Fe4 octahedra, and  a faceface with one C(3)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 63-70°. In the eighth Fe site, Fe(8) is bonded to one Sm(2), two equivalent Sm(4), one Cr(3), one Fe(16), one Fe(18), one Fe(2), one Fe(22), one Fe(24), one Fe(28), one Fe(3), and one Fe(30) atom to form distorted FeSm3CrFe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one C(2)Sm2Fe4 octahedra, and  a faceface with one C(4)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 62-71°. In the ninth Fe site, Fe(9) is bonded in a single-bond geometry to one Cr(3), one Fe(13), one Fe(23), one Fe(3), one Fe(6), and one C(2) atom. In the tenth Fe site, Fe(10) is bonded in a single-bond geometry to one Cr(2), one Fe(14), one Fe(24), one Fe(4), one Fe(5), and one C(1) atom. In the eleventh Fe site, Fe(11) is bonded in a single-bond geometry to one Cr(2), one Fe(1), one Fe(13), one Fe(27), one Fe(5), and one C(3) atom. In the twelfth Fe site, Fe(12) is bonded in a single-bond geometry to one Cr(3), one Fe(14), one Fe(2), one Fe(28), one Fe(6), and one C(4) atom. In the thirteenth Fe site, Fe(13) is bonded to one Sm(3), two equivalent Sm(1), one Fe(1), one Fe(11), one Fe(19), one Fe(23), one Fe(25), one Fe(27), one Fe(3), one Fe(31), and one Fe(9) atom to form distorted FeSm3Fe9 cuboctahedra that share  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(3)Sm2Fe4 octahedra,  an edgeedge with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(1)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one C(2)Sm2Fe4 octahedra, and  a faceface with one C(3)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 62-69°. In the fourteenth Fe site, Fe(14) is bonded to one Sm(4), two equivalent Sm(2), one Cr(1), one Fe(10), one Fe(12), one Fe(2), one Fe(20), one Fe(24), one Fe(26), one Fe(28), and one Fe(4) atom to form distorted FeSm3CrFe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one C(1)Sm2Fe4 octahedra, and  a faceface with one C(4)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 61-70°. In the fifteenth Fe site, Fe(15) is bonded in a single-bond geometry to one Cr(1), one Fe(27), one Fe(4), one Fe(5), one Fe(7), and one C(1) atom. In the sixteenth Fe site, Fe(16) is bonded in a single-bond geometry to one Fe(28), one Fe(3), one Fe(6), one Fe(8), and one C(2) atom. In the seventeenth Fe site, Fe(17) is bonded in a single-bond geometry to one Fe(1), one Fe(23), one Fe(6), one Fe(7), and one C(3) atom. In the eighteenth Fe site, Fe(18) is bonded in a single-bond geometry to one Cr(1), one Fe(2), one Fe(24), one Fe(5), one Fe(8), and one C(4) atom. In the nineteenth Fe site, Fe(19) is bonded in a single-bond geometry to one Cr(3), one Fe(13), one Fe(28), one Fe(3), one Fe(6), and one C(2) atom. In the twentieth Fe site, Fe(20) is bonded in a single-bond geometry to one Cr(1), one Cr(2), one Fe(14), one Fe(27), one Fe(4), one Fe(5), and one C(1) atom. In the twenty-first Fe site, Fe(21) is bonded in a single-bond geometry to one Cr(1), one Cr(2), one Fe(1), one Fe(27), one Fe(5), one Fe(7), and one C(3) atom. In the twenty-second Fe site, Fe(22) is bonded in a single-bond geometry to one Cr(3), one Fe(2), one Fe(28), one Fe(6), one Fe(8), and one C(4) atom. In the twenty-third Fe site, Fe(23) is bonded to one Sm(1), one Sm(3), one Cr(3), one Fe(1), one Fe(13), one Fe(17), one Fe(25), one Fe(3), one Fe(30), one Fe(31), one Fe(7), and one Fe(9) atom to form distorted FeSm2CrFe9 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(3)Sm2Fe4 octahedra,  an edgeedge with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(1)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  an edgeedge with one C(2)Sm2Fe4 octahedra,  an edgeedge with one C(3)Sm2Fe4 octahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, and faces with two equivalent Fe(13)Sm3Fe9 cuboctahedra. The corner-sharing octahedral tilt angles range from 21-28°. In the twenty-fourth Fe site, Fe(24) is bonded to one Sm(2), one Sm(4), one Cr(1), one Cr(2), one Fe(10), one Fe(14), one Fe(18), one Fe(2), one Fe(26), one Fe(29), one Fe(4), and one Fe(8) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2CrFe9 cuboctahedra,  an edgeedge with one C(1)Sm2Fe4 octahedra,  an edgeedge with one C(4)Sm2Fe4 octahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, and faces with two equivalent Fe(14)Sm3CrFe8 cuboctahedra. The corner-sharing octahedral tilt angles range from 22-28°. In the twenty-fifth Fe site, Fe(25) is bonded in a single-bond geometry to one Cr(3), one Fe(1), one Fe(13), one Fe(23), one Fe(6), and one C(3) atom. In the twenty-sixth Fe site, Fe(26) is bonded in a single-bond geometry to one Cr(1), one Cr(2), one Fe(14), one Fe(2), one Fe(24), one Fe(5), and one C(4) atom. In the twenty-seventh Fe site, Fe(27) is bonded to one Sm(1), one Sm(3), one Cr(1), one Cr(2), one Fe(1), one Fe(11), one Fe(13), one Fe(15), one Fe(20), one Fe(21), one Fe(4), and one Fe(7) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(3)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(1)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(3)Sm2CrFe9 cuboctahedra,  an edgeedge with one C(1)Sm2Fe4 octahedra,  an edgeedge with one C(3)Sm2Fe4 octahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, and faces with two equivalent Fe(7)Sm3CrFe8 cuboctahedra. The corner-sharing octahedral tilt angles range from 22-28°. In the twenty-eighth Fe site, Fe(28) is bonded to one Sm(2), one Sm(4), one Cr(3), one Fe(12), one Fe(14), one Fe(16), one Fe(19), one Fe(2), one Fe(22), one Fe(3), one Fe(31), and one Fe(8) atom to form distorted FeSm2CrFe9 cuboctahedra that share  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  an edgeedge with one C(2)Sm2Fe4 octahedra,  an edgeedge with one C(4)Sm2Fe4 octahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent Fe(8)Sm3CrFe8 cuboctahedra. The corner-sharing octahedral tilt angles range from 22-28°. In the twenty-ninth Fe site, Fe(29) is bonded in a single-bond geometry to one Cr(1), one Cr(2), one Fe(24), one Fe(4), one Fe(5), one Fe(7), and one C(1) atom. In the thirtieth Fe site, Fe(30) is bonded in a single-bond geometry to one Cr(3), one Fe(23), one Fe(3), one Fe(6), one Fe(8), and one C(2) atom. In the thirty-first Fe site, Fe(31) is bonded in a distorted single-bond geometry to one Cr(3), one Fe(1), one Fe(13), one Fe(23), one Fe(28), one Fe(3), and one Fe(6) atom. There are four inequivalent C sites. In the first C site, C(1) is bonded to one Sm(2), one Sm(3), one Fe(10), one Fe(15), one Fe(20), and one Fe(29) atom to form CSm2Fe4 octahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(3)Sm2Fe4 octahedra,  a cornercorner with one C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(4)Sm2Cr2Fe8 cuboctahedra, and faces with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra. The corner-sharing octahedral tilt angles are 63°. In the second C site, C(2) is bonded to one Sm(1), one Sm(4), one Fe(16), one Fe(19), one Fe(30), and one Fe(9) atom to form CSm2Fe4 octahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(3)Sm2Fe4 octahedra,  a cornercorner with one C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent Fe(3)Sm2CrFe9 cuboctahedra. The corner-sharing octahedral tilt angles range from 63-64°. In the third C site, C(3) is bonded to one Sm(1), one Sm(3), one Fe(11), one Fe(17), one Fe(21), and one Fe(25) atom to form CSm2Fe4 octahedra that share  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra, corners with two equivalent Fe(27)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(23)Sm2CrFe9 cuboctahedra, corners with two equivalent Fe(7)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent Fe(1)Sm2CrFe9 cuboctahedra. The corner-sharing octahedral tilt angles are 63°. In the fourth C site, C(4) is bonded to one Sm(2), one Sm(4), one Fe(12), one Fe(18), one Fe(22), and one Fe(26) atom to form CSm2Fe4 octahedra that share  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra, corners with two equivalent Fe(24)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(28)Sm2CrFe9 cuboctahedra, corners with two equivalent Fe(14)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, and faces with two equivalent Fe(2)Sm2Cr2Fe8 cuboctahedra. The corner-sharing octahedral tilt angles range from 63-64°. is represented by the CIF card [CIF]
data_Sm4Cr3Fe31C4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.480
_cell_length_b   6.488
_cell_length_c   12.934
_cell_angle_alpha   83.436
_cell_angle_beta   83.576
_cell_angle_gamma   83.466
_symmetry_Int_Tables_number   1
_cell_volume   533.992
_cell_formula_units_Z   1
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
  Sm  Sm0  1  0.665  0.651  0.325  1.0
  Sm  Sm1  1  0.664  0.648  0.825  1.0
  Sm  Sm2  1  0.338  0.351  0.175  1.0
  Sm  Sm3  1  0.340  0.355  0.678  1.0
  Cr  Cr4  1  0.912  0.914  0.957  1.0
  Cr  Cr5  1  0.086  0.086  0.044  1.0
  Cr  Cr6  1  0.093  0.095  0.547  1.0
  Fe  Fe7  1  0.999  0.001  0.249  1.0
  Fe  Fe8  1  1.000  1.000  0.750  1.0
  Fe  Fe9  1  1.000  0.498  0.501  1.0
  Fe  Fe10  1  0.000  0.500  1.000  1.0
  Fe  Fe11  1  0.500  0.000  0.999  1.0
  Fe  Fe12  1  0.498  0.000  0.500  1.0
  Fe  Fe13  1  0.855  0.342  0.171  1.0
  Fe  Fe14  1  0.856  0.340  0.672  1.0
  Fe  Fe15  1  0.341  0.344  0.428  1.0
  Fe  Fe16  1  0.339  0.343  0.929  1.0
  Fe  Fe17  1  0.340  0.857  0.171  1.0
  Fe  Fe18  1  0.340  0.856  0.672  1.0
  Fe  Fe19  1  0.143  0.657  0.329  1.0
  Fe  Fe20  1  0.144  0.660  0.828  1.0
  Fe  Fe21  1  0.661  0.658  0.072  1.0
  Fe  Fe22  1  0.662  0.656  0.572  1.0
  Fe  Fe23  1  0.660  0.144  0.329  1.0
  Fe  Fe24  1  0.662  0.142  0.828  1.0
  Fe  Fe25  1  0.286  0.712  0.499  1.0
  Fe  Fe26  1  0.289  0.714  0.998  1.0
  Fe  Fe27  1  0.712  0.002  0.142  1.0
  Fe  Fe28  1  0.712  0.000  0.642  1.0
  Fe  Fe29  1  0.001  0.281  0.359  1.0
  Fe  Fe30  1  1.000  0.282  0.859  1.0
  Fe  Fe31  1  0.285  0.997  0.356  1.0
  Fe  Fe32  1  0.287  0.999  0.858  1.0
  Fe  Fe33  1  0.001  0.718  0.140  1.0
  Fe  Fe34  1  0.001  0.716  0.641  1.0
  Fe  Fe35  1  0.712  0.285  0.002  1.0
  Fe  Fe36  1  0.711  0.283  0.502  1.0
  Fe  Fe37  1  0.907  0.908  0.454  1.0
  C  C38  1  0.500  0.501  1.000  1.0
  C  C39  1  0.500  0.500  0.500  1.0
  C  C40  1  0.500  0.000  0.250  1.0
  C  C41  1  0.500  0.000  0.750  1.0
[/CIF]
.
The compound described by Sm4Cr3Fe31C4 crystallizes in the triclinic P1 space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a distorted bent 120 degrees geometry to one Fe(1), one Fe(23), one Fe(27), one Fe(3), one Fe(6), one Fe(7), two equivalent Fe(13), one C(2), and one C(3) atom. In the second Sm site, Sm(2) is bonded in a distorted bent 120 degrees geometry to one Cr(1), one Fe(2), one Fe(24), one Fe(28), one Fe(4), one Fe(5), one Fe(8), two equivalent Fe(14), one C(1), and one C(4) atom. In the third Sm site, Sm(3) is bonded in a distorted bent 120 degrees geometry to one Cr(2), one Fe(1), one Fe(13), one Fe(23), one Fe(27), one Fe(4), one Fe(5), two equivalent Fe(7), one C(1), and one C(3) atom. In the fourth Sm site, Sm(4) is bonded in a distorted bent 120 degrees geometry to one Cr(3), one Fe(14), one Fe(2), one Fe(24), one Fe(28), one Fe(3), one Fe(6), two equivalent Fe(8), one C(2), and one C(4) atom. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 14-coordinate geometry to one Sm(2), one Cr(2), one Fe(14), one Fe(15), one Fe(18), one Fe(2), one Fe(20), one Fe(21), one Fe(24), one Fe(26), one Fe(27), one Fe(29), one Fe(4), and one Fe(5) atom. In the second Cr site, Cr(2) is bonded in a 14-coordinate geometry to one Sm(3), one Cr(1), one Fe(1), one Fe(10), one Fe(11), one Fe(20), one Fe(21), one Fe(24), one Fe(26), one Fe(27), one Fe(29), one Fe(4), one Fe(5), and one Fe(7) atom. In the third Cr site, Cr(3) is bonded in a 14-coordinate geometry to one Sm(4), one Fe(12), one Fe(19), one Fe(2), one Fe(22), one Fe(23), one Fe(25), one Fe(28), one Fe(3), one Fe(30), one Fe(31), one Fe(6), one Fe(8), and one Fe(9) atom. There are thirty-one inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Sm(1), one Sm(3), one Cr(2), one Fe(11), one Fe(13), one Fe(17), one Fe(21), one Fe(23), one Fe(25), one Fe(27), one Fe(31), and one Fe(7) atom to form distorted FeSm2CrFe9 cuboctahedra that share  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(7)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(13)Sm3Fe9 cuboctahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent C(3)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 45-46°. In the second Fe site, Fe(2) is bonded to one Sm(2), one Sm(4), one Cr(1), one Cr(3), one Fe(12), one Fe(14), one Fe(18), one Fe(22), one Fe(24), one Fe(26), one Fe(28), and one Fe(8) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(14)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(8)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, and faces with two equivalent C(4)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 46-48°. In the third Fe site, Fe(3) is bonded to one Sm(1), one Sm(4), one Cr(3), one Fe(13), one Fe(16), one Fe(19), one Fe(23), one Fe(28), one Fe(30), one Fe(31), one Fe(8), and one Fe(9) atom to form distorted FeSm2CrFe9 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(3)Sm2Fe4 octahedra,  a cornercorner with one C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(14)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent C(2)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 45-48°. In the fourth Fe site, Fe(4) is bonded to one Sm(2), one Sm(3), one Cr(1), one Cr(2), one Fe(10), one Fe(14), one Fe(15), one Fe(20), one Fe(24), one Fe(27), one Fe(29), and one Fe(7) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one C(3)Sm2Fe4 octahedra,  a cornercorner with one C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(13)Sm3Fe9 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, and faces with two equivalent C(1)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles are 46°. In the fifth Fe site, Fe(5) is bonded to one Sm(2), one Sm(3), one Cr(1), one Cr(2), one Fe(10), one Fe(11), one Fe(15), one Fe(18), one Fe(20), one Fe(21), one Fe(26), and one Fe(29) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(4)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(8)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(13)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(14)Sm3CrFe8 cuboctahedra,  an edgeedge with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(24)Sm2Cr2Fe8 cuboctahedra, faces with two equivalent Fe(27)Sm2Cr2Fe8 cuboctahedra, faces with two equivalent Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one C(3)Sm2Fe4 octahedra,  a faceface with one C(4)Sm2Fe4 octahedra, and faces with two equivalent C(1)Sm2Fe4 octahedra. In the sixth Fe site, Fe(6) is bonded in a 12-coordinate geometry to one Sm(1), one Sm(4), one Cr(3), one Fe(12), one Fe(16), one Fe(17), one Fe(19), one Fe(22), one Fe(25), one Fe(30), one Fe(31), and one Fe(9) atom. In the seventh Fe site, Fe(7) is bonded to one Sm(1), two equivalent Sm(3), one Cr(2), one Fe(1), one Fe(15), one Fe(17), one Fe(21), one Fe(23), one Fe(27), one Fe(29), and one Fe(4) atom to form distorted FeSm3CrFe8 cuboctahedra that share  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(3)Sm2Fe4 octahedra,  an edgeedge with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(1)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(3)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(13)Sm3Fe9 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one C(1)Sm2Fe4 octahedra, and  a faceface with one C(3)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 63-70°. In the eighth Fe site, Fe(8) is bonded to one Sm(2), two equivalent Sm(4), one Cr(3), one Fe(16), one Fe(18), one Fe(2), one Fe(22), one Fe(24), one Fe(28), one Fe(3), and one Fe(30) atom to form distorted FeSm3CrFe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one C(2)Sm2Fe4 octahedra, and  a faceface with one C(4)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 62-71°. In the ninth Fe site, Fe(9) is bonded in a single-bond geometry to one Cr(3), one Fe(13), one Fe(23), one Fe(3), one Fe(6), and one C(2) atom. In the tenth Fe site, Fe(10) is bonded in a single-bond geometry to one Cr(2), one Fe(14), one Fe(24), one Fe(4), one Fe(5), and one C(1) atom. In the eleventh Fe site, Fe(11) is bonded in a single-bond geometry to one Cr(2), one Fe(1), one Fe(13), one Fe(27), one Fe(5), and one C(3) atom. In the twelfth Fe site, Fe(12) is bonded in a single-bond geometry to one Cr(3), one Fe(14), one Fe(2), one Fe(28), one Fe(6), and one C(4) atom. In the thirteenth Fe site, Fe(13) is bonded to one Sm(3), two equivalent Sm(1), one Fe(1), one Fe(11), one Fe(19), one Fe(23), one Fe(25), one Fe(27), one Fe(3), one Fe(31), and one Fe(9) atom to form distorted FeSm3Fe9 cuboctahedra that share  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(3)Sm2Fe4 octahedra,  an edgeedge with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(1)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one C(2)Sm2Fe4 octahedra, and  a faceface with one C(3)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 62-69°. In the fourteenth Fe site, Fe(14) is bonded to one Sm(4), two equivalent Sm(2), one Cr(1), one Fe(10), one Fe(12), one Fe(2), one Fe(20), one Fe(24), one Fe(26), one Fe(28), and one Fe(4) atom to form distorted FeSm3CrFe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one C(1)Sm2Fe4 octahedra, and  a faceface with one C(4)Sm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 61-70°. In the fifteenth Fe site, Fe(15) is bonded in a single-bond geometry to one Cr(1), one Fe(27), one Fe(4), one Fe(5), one Fe(7), and one C(1) atom. In the sixteenth Fe site, Fe(16) is bonded in a single-bond geometry to one Fe(28), one Fe(3), one Fe(6), one Fe(8), and one C(2) atom. In the seventeenth Fe site, Fe(17) is bonded in a single-bond geometry to one Fe(1), one Fe(23), one Fe(6), one Fe(7), and one C(3) atom. In the eighteenth Fe site, Fe(18) is bonded in a single-bond geometry to one Cr(1), one Fe(2), one Fe(24), one Fe(5), one Fe(8), and one C(4) atom. In the nineteenth Fe site, Fe(19) is bonded in a single-bond geometry to one Cr(3), one Fe(13), one Fe(28), one Fe(3), one Fe(6), and one C(2) atom. In the twentieth Fe site, Fe(20) is bonded in a single-bond geometry to one Cr(1), one Cr(2), one Fe(14), one Fe(27), one Fe(4), one Fe(5), and one C(1) atom. In the twenty-first Fe site, Fe(21) is bonded in a single-bond geometry to one Cr(1), one Cr(2), one Fe(1), one Fe(27), one Fe(5), one Fe(7), and one C(3) atom. In the twenty-second Fe site, Fe(22) is bonded in a single-bond geometry to one Cr(3), one Fe(2), one Fe(28), one Fe(6), one Fe(8), and one C(4) atom. In the twenty-third Fe site, Fe(23) is bonded to one Sm(1), one Sm(3), one Cr(3), one Fe(1), one Fe(13), one Fe(17), one Fe(25), one Fe(3), one Fe(30), one Fe(31), one Fe(7), and one Fe(9) atom to form distorted FeSm2CrFe9 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(3)Sm2Fe4 octahedra,  an edgeedge with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(1)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  an edgeedge with one C(2)Sm2Fe4 octahedra,  an edgeedge with one C(3)Sm2Fe4 octahedra,  a faceface with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, and faces with two equivalent Fe(13)Sm3Fe9 cuboctahedra. The corner-sharing octahedral tilt angles range from 21-28°. In the twenty-fourth Fe site, Fe(24) is bonded to one Sm(2), one Sm(4), one Cr(1), one Cr(2), one Fe(10), one Fe(14), one Fe(18), one Fe(2), one Fe(26), one Fe(29), one Fe(4), and one Fe(8) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2CrFe9 cuboctahedra,  an edgeedge with one C(1)Sm2Fe4 octahedra,  an edgeedge with one C(4)Sm2Fe4 octahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, and faces with two equivalent Fe(14)Sm3CrFe8 cuboctahedra. The corner-sharing octahedral tilt angles range from 22-28°. In the twenty-fifth Fe site, Fe(25) is bonded in a single-bond geometry to one Cr(3), one Fe(1), one Fe(13), one Fe(23), one Fe(6), and one C(3) atom. In the twenty-sixth Fe site, Fe(26) is bonded in a single-bond geometry to one Cr(1), one Cr(2), one Fe(14), one Fe(2), one Fe(24), one Fe(5), and one C(4) atom. In the twenty-seventh Fe site, Fe(27) is bonded to one Sm(1), one Sm(3), one Cr(1), one Cr(2), one Fe(1), one Fe(11), one Fe(13), one Fe(15), one Fe(20), one Fe(21), one Fe(4), and one Fe(7) atom to form distorted FeSm2Cr2Fe8 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(3)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(1)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(3)Sm2CrFe9 cuboctahedra,  an edgeedge with one C(1)Sm2Fe4 octahedra,  an edgeedge with one C(3)Sm2Fe4 octahedra,  a faceface with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(1)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra, and faces with two equivalent Fe(7)Sm3CrFe8 cuboctahedra. The corner-sharing octahedral tilt angles range from 22-28°. In the twenty-eighth Fe site, Fe(28) is bonded to one Sm(2), one Sm(4), one Cr(3), one Fe(12), one Fe(14), one Fe(16), one Fe(19), one Fe(2), one Fe(22), one Fe(3), one Fe(31), and one Fe(8) atom to form distorted FeSm2CrFe9 cuboctahedra that share  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra, corners with two equivalent C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  an edgeedge with one C(2)Sm2Fe4 octahedra,  an edgeedge with one C(4)Sm2Fe4 octahedra,  a faceface with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(3)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent Fe(8)Sm3CrFe8 cuboctahedra. The corner-sharing octahedral tilt angles range from 22-28°. In the twenty-ninth Fe site, Fe(29) is bonded in a single-bond geometry to one Cr(1), one Cr(2), one Fe(24), one Fe(4), one Fe(5), one Fe(7), and one C(1) atom. In the thirtieth Fe site, Fe(30) is bonded in a single-bond geometry to one Cr(3), one Fe(23), one Fe(3), one Fe(6), one Fe(8), and one C(2) atom. In the thirty-first Fe site, Fe(31) is bonded in a distorted single-bond geometry to one Cr(3), one Fe(1), one Fe(13), one Fe(23), one Fe(28), one Fe(3), and one Fe(6) atom. There are four inequivalent C sites. In the first C site, C(1) is bonded to one Sm(2), one Sm(3), one Fe(10), one Fe(15), one Fe(20), and one Fe(29) atom to form CSm2Fe4 octahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(3)Sm2Fe4 octahedra,  a cornercorner with one C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra, faces with two equivalent Fe(4)Sm2Cr2Fe8 cuboctahedra, and faces with two equivalent Fe(5)Sm2Cr2Fe8 cuboctahedra. The corner-sharing octahedral tilt angles are 63°. In the second C site, C(2) is bonded to one Sm(1), one Sm(4), one Fe(16), one Fe(19), one Fe(30), and one Fe(9) atom to form CSm2Fe4 octahedra that share  a cornercorner with one Fe(2)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(1)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(23)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(28)Sm2CrFe9 cuboctahedra,  a cornercorner with one Fe(14)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(7)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(3)Sm2Fe4 octahedra,  a cornercorner with one C(4)Sm2Fe4 octahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent Fe(3)Sm2CrFe9 cuboctahedra. The corner-sharing octahedral tilt angles range from 63-64°. In the third C site, C(3) is bonded to one Sm(1), one Sm(3), one Fe(11), one Fe(17), one Fe(21), and one Fe(25) atom to form CSm2Fe4 octahedra that share  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra, corners with two equivalent Fe(27)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(23)Sm2CrFe9 cuboctahedra, corners with two equivalent Fe(7)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(13)Sm3Fe9 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra,  an edgeedge with one Fe(27)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(23)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(7)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(13)Sm3Fe9 cuboctahedra, and faces with two equivalent Fe(1)Sm2CrFe9 cuboctahedra. The corner-sharing octahedral tilt angles are 63°. In the fourth C site, C(4) is bonded to one Sm(2), one Sm(4), one Fe(12), one Fe(18), one Fe(22), and one Fe(26) atom to form CSm2Fe4 octahedra that share  a cornercorner with one Fe(4)Sm2Cr2Fe8 cuboctahedra,  a cornercorner with one Fe(3)Sm2CrFe9 cuboctahedra, corners with two equivalent Fe(24)Sm2Cr2Fe8 cuboctahedra, corners with two equivalent Fe(28)Sm2CrFe9 cuboctahedra, corners with two equivalent Fe(14)Sm3CrFe8 cuboctahedra, corners with two equivalent Fe(8)Sm3CrFe8 cuboctahedra,  a cornercorner with one C(1)Sm2Fe4 octahedra,  a cornercorner with one C(2)Sm2Fe4 octahedra,  an edgeedge with one Fe(24)Sm2Cr2Fe8 cuboctahedra,  an edgeedge with one Fe(28)Sm2CrFe9 cuboctahedra,  a faceface with one Fe(5)Sm2Cr2Fe8 cuboctahedra,  a faceface with one Fe(14)Sm3CrFe8 cuboctahedra,  a faceface with one Fe(8)Sm3CrFe8 cuboctahedra, and faces with two equivalent Fe(2)Sm2Cr2Fe8 cuboctahedra. The corner-sharing octahedral tilt angles range from 63-64°. is represented by the CIF card [CIF]
data_Sm4Cr3Fe31C4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.480
_cell_length_b   6.488
_cell_length_c   12.934
_cell_angle_alpha   83.436
_cell_angle_beta   83.576
_cell_angle_gamma   83.466
_symmetry_Int_Tables_number   1
_cell_volume   533.992
_cell_formula_units_Z   1
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
  Sm  Sm0  1  0.665  0.651  0.325  1.0
  Sm  Sm1  1  0.664  0.648  0.825  1.0
  Sm  Sm2  1  0.338  0.351  0.175  1.0
  Sm  Sm3  1  0.340  0.355  0.678  1.0
  Cr  Cr4  1  0.912  0.914  0.957  1.0
  Cr  Cr5  1  0.086  0.086  0.044  1.0
  Cr  Cr6  1  0.093  0.095  0.547  1.0
  Fe  Fe7  1  0.999  0.001  0.249  1.0
  Fe  Fe8  1  1.000  1.000  0.750  1.0
  Fe  Fe9  1  1.000  0.498  0.501  1.0
  Fe  Fe10  1  0.000  0.500  1.000  1.0
  Fe  Fe11  1  0.500  0.000  0.999  1.0
  Fe  Fe12  1  0.498  0.000  0.500  1.0
  Fe  Fe13  1  0.855  0.342  0.171  1.0
  Fe  Fe14  1  0.856  0.340  0.672  1.0
  Fe  Fe15  1  0.341  0.344  0.428  1.0
  Fe  Fe16  1  0.339  0.343  0.929  1.0
  Fe  Fe17  1  0.340  0.857  0.171  1.0
  Fe  Fe18  1  0.340  0.856  0.672  1.0
  Fe  Fe19  1  0.143  0.657  0.329  1.0
  Fe  Fe20  1  0.144  0.660  0.828  1.0
  Fe  Fe21  1  0.661  0.658  0.072  1.0
  Fe  Fe22  1  0.662  0.656  0.572  1.0
  Fe  Fe23  1  0.660  0.144  0.329  1.0
  Fe  Fe24  1  0.662  0.142  0.828  1.0
  Fe  Fe25  1  0.286  0.712  0.499  1.0
  Fe  Fe26  1  0.289  0.714  0.998  1.0
  Fe  Fe27  1  0.712  0.002  0.142  1.0
  Fe  Fe28  1  0.712  0.000  0.642  1.0
  Fe  Fe29  1  0.001  0.281  0.359  1.0
  Fe  Fe30  1  1.000  0.282  0.859  1.0
  Fe  Fe31  1  0.285  0.997  0.356  1.0
  Fe  Fe32  1  0.287  0.999  0.858  1.0
  Fe  Fe33  1  0.001  0.718  0.140  1.0
  Fe  Fe34  1  0.001  0.716  0.641  1.0
  Fe  Fe35  1  0.712  0.285  0.002  1.0
  Fe  Fe36  1  0.711  0.283  0.502  1.0
  Fe  Fe37  1  0.907  0.908  0.454  1.0
  C  C38  1  0.500  0.501  1.000  1.0
  C  C39  1  0.500  0.500  0.500  1.0
  C  C40  1  0.500  0.000  0.250  1.0
  C  C41  1  0.500  0.000  0.750  1.0
[/CIF]
.