Ce4Pt12Sn25 crystallizes in the cubic Im-3 space group. Ce(1) is bonded to six equivalent Pt(1), six equivalent Sn(1), and six equivalent Sn(2) atoms to form distorted CeSn12Pt6 cuboctahedra that share faces with two equivalent Sn(3)Sn12 cuboctahedra and faces with six equivalent Ce(1)Sn12Pt6 cuboctahedra. Pt(1) is bonded in a 8-coordinate geometry to two equivalent Ce(1), three equivalent Sn(1), and three equivalent Sn(2) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 3-coordinate geometry to two equivalent Ce(1), three equivalent Pt(1), and one Sn(3) atom. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to two equivalent Ce(1) and three equivalent Pt(1) atoms. In the third Sn site, Sn(3) is bonded to twelve equivalent Sn(1) atoms to form SnSn12 cuboctahedra that share faces with eight equivalent Ce(1)Sn12Pt6 cuboctahedra.
Ce4Pt12Sn25 crystallizes in the cubic Im-3 space group. Ce(1) is bonded to six equivalent Pt(1), six equivalent Sn(1), and six equivalent Sn(2) atoms to form distorted CeSn12Pt6 cuboctahedra that share faces with two equivalent Sn(3)Sn12 cuboctahedra and faces with six equivalent Ce(1)Sn12Pt6 cuboctahedra. All Ce(1)-Pt(1) bond lengths are 3.37 Å. All Ce(1)-Sn(1) bond lengths are 3.47 Å. All Ce(1)-Sn(2) bond lengths are 3.80 Å. Pt(1) is bonded in a 8-coordinate geometry to two equivalent Ce(1), three equivalent Sn(1), and three equivalent Sn(2) atoms. There is one shorter (2.63 Å) and two longer (2.71 Å) Pt(1)-Sn(1) bond lengths. There is one shorter (2.65 Å) and two longer (2.79 Å) Pt(1)-Sn(2) bond lengths. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 3-coordinate geometry to two equivalent Ce(1), three equivalent Pt(1), and one Sn(3) atom. The Sn(1)-Sn(3) bond length is 3.44 Å. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to two equivalent Ce(1) and three equivalent Pt(1) atoms. In the third Sn site, Sn(3) is bonded to twelve equivalent Sn(1) atoms to form SnSn12 cuboctahedra that share faces with eight equivalent Ce(1)Sn12Pt6 cuboctahedra.