The material structure described by Pr4Fe29Si5 crystallizes in the triclinic P-1 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 19-coordinate geometry to one Fe(11), one Fe(13), one Fe(14), one Fe(3), one Fe(4), one Fe(5), one Fe(6), one Fe(8), one Fe(9), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(12), two equivalent Fe(7), one Si(1), and one Si(2) atom. In the second Pr site, Pr(2) is bonded in a 19-coordinate geometry to one Fe(10), one Fe(12), one Fe(13), one Fe(15), one Fe(16), one Fe(3), one Fe(4), one Fe(5), one Fe(6), one Fe(7), two equivalent Fe(11), two equivalent Fe(2), two equivalent Fe(8), two equivalent Fe(9), and one Si(3) atom. There are sixteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Pr(1), one Fe(10), one Fe(12), one Fe(14), one Fe(4), one Fe(5), two equivalent Fe(7), one Si(1), and two equivalent Si(2) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Pr(2), one Fe(11), one Fe(15), one Fe(16), one Fe(3), one Fe(6), one Fe(9), two equivalent Fe(8), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(2)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, faces with three equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with three equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, and faces with four equivalent Fe(8)Pr3Fe8Si cuboctahedra. In the third Fe site, Fe(3) is bonded to one Pr(1), one Pr(2), one Fe(10), one Fe(11), one Fe(13), one Fe(16), one Fe(2), one Fe(6), one Fe(8), one Fe(9), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(8)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(15)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with three equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with three equivalent Fe(8)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(9)Pr3Fe8Si cuboctahedra. In the fourth Fe site, Fe(4) is bonded in a 12-coordinate geometry to one Pr(1), one Pr(2), one Fe(1), one Fe(10), one Fe(12), one Fe(13), one Fe(5), one Fe(7), one Fe(9), one Si(1), and two equivalent Si(2) atoms. In the fifth Fe site, Fe(5) is bonded to one Pr(1), one Pr(2), one Fe(1), one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(4), one Fe(7), and two equivalent Si(2) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(2)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, faces with three equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, and faces with three equivalent Fe(12)Pr3Fe8Si cuboctahedra. In the sixth Fe site, Fe(6) is bonded to one Pr(1), one Pr(2), one Fe(11), one Fe(12), one Fe(13), one Fe(15), one Fe(2), one Fe(3), one Fe(8), one Fe(9), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(8)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(16)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, faces with three equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with three equivalent Fe(11)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(8)Pr3Fe8Si cuboctahedra. In the seventh Fe site, Fe(7) is bonded to one Pr(2), two equivalent Pr(1), one Fe(10), one Fe(12), one Fe(14), one Fe(4), one Fe(5), two equivalent Fe(1), one Si(1), and one Si(2) atom to form distorted FePr3Fe7Si2 cuboctahedra that share  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, faces with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(5)Pr2Fe8Si2 cuboctahedra. In the eighth Fe site, Fe(8) is bonded to one Pr(1), two equivalent Pr(2), one Fe(11), one Fe(15), one Fe(16), one Fe(3), one Fe(6), one Fe(9), two equivalent Fe(2), and one Si(3) atom to form FePr3Fe8Si cuboctahedra that share  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, faces with three equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with three equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, and faces with four equivalent Fe(2)Pr2Fe8Si2 cuboctahedra. In the ninth Fe site, Fe(9) is bonded to one Pr(1), two equivalent Pr(2), one Fe(12), one Fe(13), one Fe(16), one Fe(2), one Fe(3), one Fe(4), one Fe(6), one Fe(8), and one Si(3) atom to form FePr3Fe8Si cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(14)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(9)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(2)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(3)Pr2Fe8Si2 cuboctahedra. In the tenth Fe site, Fe(10) is bonded to one Pr(2), two equivalent Pr(1), one Fe(1), one Fe(11), one Fe(13), one Fe(3), one Fe(4), one Fe(5), one Fe(7), one Si(1), and one Si(2) atom to form distorted FePr3Fe7Si2 cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(8)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(15)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(12)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(8)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, and faces with two equivalent Fe(12)Pr3Fe8Si cuboctahedra. In the eleventh Fe site, Fe(11) is bonded to one Pr(1), two equivalent Pr(2), one Fe(10), one Fe(13), one Fe(15), one Fe(2), one Fe(3), one Fe(5), one Fe(6), one Fe(8), and one Si(3) atom to form FePr3Fe8Si cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(2)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(6)Pr2Fe8Si2 cuboctahedra. In the twelfth Fe site, Fe(12) is bonded to one Pr(2), two equivalent Pr(1), one Fe(1), one Fe(13), one Fe(14), one Fe(4), one Fe(5), one Fe(6), one Fe(7), one Fe(9), and one Si(2) atom to form FePr3Fe8Si cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(8)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(16)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(8)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, faces with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, and faces with three equivalent Fe(5)Pr2Fe8Si2 cuboctahedra. In the thirteenth Fe site, Fe(13) is bonded to one Pr(1), one Pr(2), one Fe(10), one Fe(11), one Fe(12), one Fe(3), one Fe(4), one Fe(5), one Fe(6), one Fe(9), one Si(2), and one Si(3) atom to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with three equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with three equivalent Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(8)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, and faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra. In the fourteenth Fe site, Fe(14) is bonded to two equivalent Pr(1), two equivalent Fe(1), two equivalent Fe(12), two equivalent Fe(5), two equivalent Fe(7), and two equivalent Si(2) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with four equivalent Fe(9)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, edges with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, edges with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, edges with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, faces with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, and faces with two equivalent Fe(12)Pr3Fe8Si cuboctahedra. In the fifteenth Fe site, Fe(15) is bonded to two equivalent Pr(2), two equivalent Fe(11), two equivalent Fe(2), two equivalent Fe(6), two equivalent Fe(8), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(16)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with four equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, edges with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, edges with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, edges with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(16)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, and faces with four equivalent Fe(3)Pr2Fe8Si2 cuboctahedra. In the sixteenth Fe site, Fe(16) is bonded to two equivalent Pr(2), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(8), two equivalent Fe(9), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(15)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with four equivalent Fe(12)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, edges with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, edges with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(15)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, and faces with four equivalent Fe(6)Pr2Fe8Si2 cuboctahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(7), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 14-coordinate geometry to one Pr(1), one Fe(10), one Fe(12), one Fe(13), one Fe(14), one Fe(7), two equivalent Fe(1), two equivalent Fe(4), two equivalent Fe(5), one Si(1), and one Si(2) atom. In the third Si site, Si(3) is bonded in a 14-coordinate geometry to one Pr(2), one Fe(11), one Fe(13), one Fe(15), one Fe(16), one Fe(8), one Fe(9), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(6), and one Si(3) atom. is represented by the CIF card [CIF]
data_Pr4Fe29Si5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.470
_cell_length_b   6.500
_cell_length_c   12.928
_cell_angle_alpha   82.255
_cell_angle_beta   81.815
_cell_angle_gamma   82.360
_symmetry_Int_Tables_number   1
_cell_volume   529.614
_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
  Pr  Pr0  1  0.348  0.345  0.673  1.0
  Pr  Pr1  1  0.346  0.347  0.174  1.0
  Pr  Pr2  1  0.654  0.653  0.826  1.0
  Pr  Pr3  1  0.652  0.655  0.327  1.0
  Fe  Fe4  1  0.287  0.709  0.499  1.0
  Fe  Fe5  1  0.286  0.716  1.000  1.0
  Fe  Fe6  1  0.000  0.286  0.857  1.0
  Fe  Fe7  1  0.001  0.290  0.357  1.0
  Fe  Fe8  1  0.718  0.000  0.641  1.0
  Fe  Fe9  1  0.715  0.001  0.142  1.0
  Fe  Fe10  1  0.999  0.710  0.643  1.0
  Fe  Fe11  1  1.000  0.714  0.143  1.0
  Fe  Fe12  1  0.285  0.999  0.858  1.0
  Fe  Fe13  1  0.282  1.000  0.359  1.0
  Fe  Fe14  1  0.714  0.284  0.000  1.0
  Fe  Fe15  1  0.713  0.291  0.501  1.0
  Fe  Fe16  1  0.664  0.666  0.575  1.0
  Fe  Fe17  1  0.661  0.662  0.077  1.0
  Fe  Fe18  1  0.154  0.663  0.830  1.0
  Fe  Fe19  1  0.151  0.665  0.332  1.0
  Fe  Fe20  1  0.660  0.154  0.830  1.0
  Fe  Fe21  1  0.659  0.161  0.329  1.0
  Fe  Fe22  1  0.339  0.338  0.923  1.0
  Fe  Fe23  1  0.336  0.334  0.425  1.0
  Fe  Fe24  1  0.849  0.335  0.668  1.0
  Fe  Fe25  1  0.846  0.337  0.170  1.0
  Fe  Fe26  1  0.341  0.839  0.671  1.0
  Fe  Fe27  1  0.340  0.846  0.170  1.0
  Fe  Fe28  1  0.001  0.000  0.750  1.0
  Fe  Fe29  1  0.999  1.000  0.250  1.0
  Fe  Fe30  1  0.500  0.000  0.500  1.0
  Fe  Fe31  1  0.500  0.000  0.000  1.0
  Fe  Fe32  1  0.000  0.500  0.000  1.0
  Si  Si33  1  0.000  0.500  0.500  1.0
  Si  Si34  1  0.108  0.081  0.554  1.0
  Si  Si35  1  0.100  0.100  0.050  1.0
  Si  Si36  1  0.900  0.900  0.950  1.0
  Si  Si37  1  0.892  0.919  0.446  1.0
[/CIF]
.
The material structure described by Pr4Fe29Si5 crystallizes in the triclinic P-1 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 19-coordinate geometry to one Fe(11), one Fe(13), one Fe(14), one Fe(3), one Fe(4), one Fe(5), one Fe(6), one Fe(8), one Fe(9), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(12), two equivalent Fe(7), one Si(1), and one Si(2) atom. In the second Pr site, Pr(2) is bonded in a 19-coordinate geometry to one Fe(10), one Fe(12), one Fe(13), one Fe(15), one Fe(16), one Fe(3), one Fe(4), one Fe(5), one Fe(6), one Fe(7), two equivalent Fe(11), two equivalent Fe(2), two equivalent Fe(8), two equivalent Fe(9), and one Si(3) atom. There are sixteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Pr(1), one Fe(10), one Fe(12), one Fe(14), one Fe(4), one Fe(5), two equivalent Fe(7), one Si(1), and two equivalent Si(2) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Pr(2), one Fe(11), one Fe(15), one Fe(16), one Fe(3), one Fe(6), one Fe(9), two equivalent Fe(8), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(2)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, faces with three equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with three equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, and faces with four equivalent Fe(8)Pr3Fe8Si cuboctahedra. In the third Fe site, Fe(3) is bonded to one Pr(1), one Pr(2), one Fe(10), one Fe(11), one Fe(13), one Fe(16), one Fe(2), one Fe(6), one Fe(8), one Fe(9), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(8)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(15)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with three equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with three equivalent Fe(8)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(9)Pr3Fe8Si cuboctahedra. In the fourth Fe site, Fe(4) is bonded in a 12-coordinate geometry to one Pr(1), one Pr(2), one Fe(1), one Fe(10), one Fe(12), one Fe(13), one Fe(5), one Fe(7), one Fe(9), one Si(1), and two equivalent Si(2) atoms. In the fifth Fe site, Fe(5) is bonded to one Pr(1), one Pr(2), one Fe(1), one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(4), one Fe(7), and two equivalent Si(2) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(2)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, faces with three equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, and faces with three equivalent Fe(12)Pr3Fe8Si cuboctahedra. In the sixth Fe site, Fe(6) is bonded to one Pr(1), one Pr(2), one Fe(11), one Fe(12), one Fe(13), one Fe(15), one Fe(2), one Fe(3), one Fe(8), one Fe(9), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(8)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(16)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, faces with three equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with three equivalent Fe(11)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(8)Pr3Fe8Si cuboctahedra. In the seventh Fe site, Fe(7) is bonded to one Pr(2), two equivalent Pr(1), one Fe(10), one Fe(12), one Fe(14), one Fe(4), one Fe(5), two equivalent Fe(1), one Si(1), and one Si(2) atom to form distorted FePr3Fe7Si2 cuboctahedra that share  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, faces with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(5)Pr2Fe8Si2 cuboctahedra. In the eighth Fe site, Fe(8) is bonded to one Pr(1), two equivalent Pr(2), one Fe(11), one Fe(15), one Fe(16), one Fe(3), one Fe(6), one Fe(9), two equivalent Fe(2), and one Si(3) atom to form FePr3Fe8Si cuboctahedra that share  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, faces with three equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with three equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, and faces with four equivalent Fe(2)Pr2Fe8Si2 cuboctahedra. In the ninth Fe site, Fe(9) is bonded to one Pr(1), two equivalent Pr(2), one Fe(12), one Fe(13), one Fe(16), one Fe(2), one Fe(3), one Fe(4), one Fe(6), one Fe(8), and one Si(3) atom to form FePr3Fe8Si cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(14)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(9)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(2)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(3)Pr2Fe8Si2 cuboctahedra. In the tenth Fe site, Fe(10) is bonded to one Pr(2), two equivalent Pr(1), one Fe(1), one Fe(11), one Fe(13), one Fe(3), one Fe(4), one Fe(5), one Fe(7), one Si(1), and one Si(2) atom to form distorted FePr3Fe7Si2 cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(8)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(15)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(12)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(8)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, and faces with two equivalent Fe(12)Pr3Fe8Si cuboctahedra. In the eleventh Fe site, Fe(11) is bonded to one Pr(1), two equivalent Pr(2), one Fe(10), one Fe(13), one Fe(15), one Fe(2), one Fe(3), one Fe(5), one Fe(6), one Fe(8), and one Si(3) atom to form FePr3Fe8Si cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(2)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, and faces with three equivalent Fe(6)Pr2Fe8Si2 cuboctahedra. In the twelfth Fe site, Fe(12) is bonded to one Pr(2), two equivalent Pr(1), one Fe(1), one Fe(13), one Fe(14), one Fe(4), one Fe(5), one Fe(6), one Fe(7), one Fe(9), and one Si(2) atom to form FePr3Fe8Si cuboctahedra that share  a cornercorner with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(8)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(16)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with three equivalent Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(13)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(8)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, faces with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, and faces with three equivalent Fe(5)Pr2Fe8Si2 cuboctahedra. In the thirteenth Fe site, Fe(13) is bonded to one Pr(1), one Pr(2), one Fe(10), one Fe(11), one Fe(12), one Fe(3), one Fe(4), one Fe(5), one Fe(6), one Fe(9), one Si(2), and one Si(3) atom to form distorted FePr2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(11)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(12)Pr3Fe8Si cuboctahedra,  a cornercorner with one Fe(9)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with three equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with three equivalent Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(5)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(6)Pr2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(10)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(7)Pr3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(11)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(12)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(8)Pr3Fe8Si cuboctahedra,  an edgeedge with one Fe(9)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(14)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(5)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(6)Pr2Fe8Si2 cuboctahedra,  a faceface with one Fe(10)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(7)Pr3Fe7Si2 cuboctahedra,  a faceface with one Fe(11)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(12)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(8)Pr3Fe8Si cuboctahedra,  a faceface with one Fe(9)Pr3Fe8Si cuboctahedra, and faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra. In the fourteenth Fe site, Fe(14) is bonded to two equivalent Pr(1), two equivalent Fe(1), two equivalent Fe(12), two equivalent Fe(5), two equivalent Fe(7), and two equivalent Si(2) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, corners with four equivalent Fe(9)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, edges with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, edges with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, edges with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, faces with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, and faces with two equivalent Fe(12)Pr3Fe8Si cuboctahedra. In the fifteenth Fe site, Fe(15) is bonded to two equivalent Pr(2), two equivalent Fe(11), two equivalent Fe(2), two equivalent Fe(6), two equivalent Fe(8), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(16)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with four equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, edges with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, edges with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, edges with two equivalent Fe(12)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(16)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, and faces with four equivalent Fe(3)Pr2Fe8Si2 cuboctahedra. In the sixteenth Fe site, Fe(16) is bonded to two equivalent Pr(2), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(8), two equivalent Fe(9), and two equivalent Si(3) atoms to form distorted FePr2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(15)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(5)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(6)Pr2Fe8Si2 cuboctahedra, corners with two equivalent Fe(7)Pr3Fe7Si2 cuboctahedra, corners with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, corners with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, corners with four equivalent Fe(12)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, edges with two equivalent Fe(10)Pr3Fe7Si2 cuboctahedra, edges with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, edges with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(15)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(2)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(3)Pr2Fe8Si2 cuboctahedra, faces with two equivalent Fe(11)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(8)Pr3Fe8Si cuboctahedra, faces with two equivalent Fe(9)Pr3Fe8Si cuboctahedra, and faces with four equivalent Fe(6)Pr2Fe8Si2 cuboctahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(7), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 14-coordinate geometry to one Pr(1), one Fe(10), one Fe(12), one Fe(13), one Fe(14), one Fe(7), two equivalent Fe(1), two equivalent Fe(4), two equivalent Fe(5), one Si(1), and one Si(2) atom. In the third Si site, Si(3) is bonded in a 14-coordinate geometry to one Pr(2), one Fe(11), one Fe(13), one Fe(15), one Fe(16), one Fe(8), one Fe(9), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(6), and one Si(3) atom. is represented by the CIF card [CIF]
data_Pr4Fe29Si5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.470
_cell_length_b   6.500
_cell_length_c   12.928
_cell_angle_alpha   82.255
_cell_angle_beta   81.815
_cell_angle_gamma   82.360
_symmetry_Int_Tables_number   1
_cell_volume   529.614
_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
  Pr  Pr0  1  0.348  0.345  0.673  1.0
  Pr  Pr1  1  0.346  0.347  0.174  1.0
  Pr  Pr2  1  0.654  0.653  0.826  1.0
  Pr  Pr3  1  0.652  0.655  0.327  1.0
  Fe  Fe4  1  0.287  0.709  0.499  1.0
  Fe  Fe5  1  0.286  0.716  1.000  1.0
  Fe  Fe6  1  0.000  0.286  0.857  1.0
  Fe  Fe7  1  0.001  0.290  0.357  1.0
  Fe  Fe8  1  0.718  0.000  0.641  1.0
  Fe  Fe9  1  0.715  0.001  0.142  1.0
  Fe  Fe10  1  0.999  0.710  0.643  1.0
  Fe  Fe11  1  1.000  0.714  0.143  1.0
  Fe  Fe12  1  0.285  0.999  0.858  1.0
  Fe  Fe13  1  0.282  1.000  0.359  1.0
  Fe  Fe14  1  0.714  0.284  0.000  1.0
  Fe  Fe15  1  0.713  0.291  0.501  1.0
  Fe  Fe16  1  0.664  0.666  0.575  1.0
  Fe  Fe17  1  0.661  0.662  0.077  1.0
  Fe  Fe18  1  0.154  0.663  0.830  1.0
  Fe  Fe19  1  0.151  0.665  0.332  1.0
  Fe  Fe20  1  0.660  0.154  0.830  1.0
  Fe  Fe21  1  0.659  0.161  0.329  1.0
  Fe  Fe22  1  0.339  0.338  0.923  1.0
  Fe  Fe23  1  0.336  0.334  0.425  1.0
  Fe  Fe24  1  0.849  0.335  0.668  1.0
  Fe  Fe25  1  0.846  0.337  0.170  1.0
  Fe  Fe26  1  0.341  0.839  0.671  1.0
  Fe  Fe27  1  0.340  0.846  0.170  1.0
  Fe  Fe28  1  0.001  0.000  0.750  1.0
  Fe  Fe29  1  0.999  1.000  0.250  1.0
  Fe  Fe30  1  0.500  0.000  0.500  1.0
  Fe  Fe31  1  0.500  0.000  0.000  1.0
  Fe  Fe32  1  0.000  0.500  0.000  1.0
  Si  Si33  1  0.000  0.500  0.500  1.0
  Si  Si34  1  0.108  0.081  0.554  1.0
  Si  Si35  1  0.100  0.100  0.050  1.0
  Si  Si36  1  0.900  0.900  0.950  1.0
  Si  Si37  1  0.892  0.919  0.446  1.0
[/CIF]
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