Ce2Pt7Ge4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 17-coordinate geometry to one Pt(2), one Pt(4), one Pt(7), two equivalent Pt(5), three equivalent Pt(1), three equivalent Pt(3), two equivalent Ge(1), two equivalent Ge(3), and two equivalent Ge(4) atoms. In the second Ce site, Ce(2) is bonded in a 12-coordinate geometry to one Pt(2), two equivalent Pt(4), two equivalent Pt(6), two equivalent Pt(7), two equivalent Ge(3), and three equivalent Ge(2) atoms. There are seven inequivalent Pt sites. In the first Pt site, Pt(5) is bonded in a 2-coordinate geometry to two equivalent Ce(1), one Ge(1), one Ge(3), and two equivalent Ge(2) atoms. In the second Pt site, Pt(6) is bonded in a 5-coordinate geometry to two equivalent Ce(2), one Ge(4), and two equivalent Ge(2) atoms. In the third Pt site, Pt(7) is bonded in a 6-coordinate geometry to one Ce(1), two equivalent Ce(2), one Ge(2), one Ge(3), and two equivalent Ge(4) atoms. In the fourth Pt site, Pt(1) is bonded to three equivalent Ce(1), one Ge(4), and three equivalent Ge(3) atoms to form a mixture of distorted edge and face-sharing PtCe3Ge4 tetrahedra. In the fifth Pt site, Pt(2) is bonded in a 3-coordinate geometry to one Ce(1), one Ce(2), one Ge(1), and two equivalent Ge(4) atoms. In the sixth Pt site, Pt(3) is bonded in a 2-coordinate geometry to three equivalent Ce(1), one Ge(4), and three equivalent Ge(1) atoms. In the seventh Pt site, Pt(4) is bonded in a 5-coordinate geometry to one Ce(1), two equivalent Ce(2), one Ge(2), and two equivalent Ge(1) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Ce(1), one Pt(2), one Pt(5), two equivalent Pt(4), and three equivalent Pt(3) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to three equivalent Ce(2), one Pt(4), one Pt(7), two equivalent Pt(5), and two equivalent Pt(6) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), one Pt(5), one Pt(7), and three equivalent Pt(1) atoms. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Ce(1), one Pt(1), one Pt(3), one Pt(6), two equivalent Pt(2), and two equivalent Pt(7) atoms.
Ce2Pt7Ge4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 17-coordinate geometry to one Pt(2), one Pt(4), one Pt(7), two equivalent Pt(5), three equivalent Pt(1), three equivalent Pt(3), two equivalent Ge(1), two equivalent Ge(3), and two equivalent Ge(4) atoms. The Ce(1)-Pt(2) bond length is 3.55 Å. The Ce(1)-Pt(4) bond length is 3.59 Å. The Ce(1)-Pt(7) bond length is 3.57 Å. Both Ce(1)-Pt(5) bond lengths are 3.22 Å. There are two shorter (3.36 Å) and one longer (3.38 Å) Ce(1)-Pt(1) bond length. There are two shorter (3.30 Å) and one longer (3.71 Å) Ce(1)-Pt(3) bond length. Both Ce(1)-Ge(1) bond lengths are 3.15 Å. Both Ce(1)-Ge(3) bond lengths are 3.15 Å. Both Ce(1)-Ge(4) bond lengths are 3.22 Å. In the second Ce site, Ce(2) is bonded in a 12-coordinate geometry to one Pt(2), two equivalent Pt(4), two equivalent Pt(6), two equivalent Pt(7), two equivalent Ge(3), and three equivalent Ge(2) atoms. The Ce(2)-Pt(2) bond length is 3.28 Å. Both Ce(2)-Pt(4) bond lengths are 3.24 Å. Both Ce(2)-Pt(6) bond lengths are 3.08 Å. Both Ce(2)-Pt(7) bond lengths are 3.12 Å. Both Ce(2)-Ge(3) bond lengths are 3.42 Å. There is one shorter (3.27 Å) and two longer (3.37 Å) Ce(2)-Ge(2) bond lengths. There are seven inequivalent Pt sites. In the first Pt site, Pt(5) is bonded in a 2-coordinate geometry to two equivalent Ce(1), one Ge(1), one Ge(3), and two equivalent Ge(2) atoms. The Pt(5)-Ge(1) bond length is 2.47 Å. The Pt(5)-Ge(3) bond length is 2.45 Å. Both Pt(5)-Ge(2) bond lengths are 2.83 Å. In the second Pt site, Pt(6) is bonded in a 5-coordinate geometry to two equivalent Ce(2), one Ge(4), and two equivalent Ge(2) atoms. The Pt(6)-Ge(4) bond length is 2.61 Å. Both Pt(6)-Ge(2) bond lengths are 2.57 Å. In the third Pt site, Pt(7) is bonded in a 6-coordinate geometry to one Ce(1), two equivalent Ce(2), one Ge(2), one Ge(3), and two equivalent Ge(4) atoms. The Pt(7)-Ge(2) bond length is 2.56 Å. The Pt(7)-Ge(3) bond length is 2.46 Å. Both Pt(7)-Ge(4) bond lengths are 2.61 Å. In the fourth Pt site, Pt(1) is bonded to three equivalent Ce(1), one Ge(4), and three equivalent Ge(3) atoms to form a mixture of distorted edge and face-sharing PtCe3Ge4 tetrahedra. The Pt(1)-Ge(4) bond length is 2.55 Å. All Pt(1)-Ge(3) bond lengths are 2.59 Å. In the fifth Pt site, Pt(2) is bonded in a 3-coordinate geometry to one Ce(1), one Ce(2), one Ge(1), and two equivalent Ge(4) atoms. The Pt(2)-Ge(1) bond length is 2.46 Å. Both Pt(2)-Ge(4) bond lengths are 2.66 Å. In the sixth Pt site, Pt(3) is bonded in a 2-coordinate geometry to three equivalent Ce(1), one Ge(4), and three equivalent Ge(1) atoms. The Pt(3)-Ge(4) bond length is 2.51 Å. There is one shorter (2.43 Å) and two longer (2.81 Å) Pt(3)-Ge(1) bond lengths. In the seventh Pt site, Pt(4) is bonded in a 5-coordinate geometry to one Ce(1), two equivalent Ce(2), one Ge(2), and two equivalent Ge(1) atoms. The Pt(4)-Ge(2) bond length is 2.45 Å. Both Pt(4)-Ge(1) bond lengths are 2.58 Å. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Ce(1), one Pt(2), one Pt(5), two equivalent Pt(4), and three equivalent Pt(3) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to three equivalent Ce(2), one Pt(4), one Pt(7), two equivalent Pt(5), and two equivalent Pt(6) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), one Pt(5), one Pt(7), and three equivalent Pt(1) atoms. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Ce(1), one Pt(1), one Pt(3), one Pt(6), two equivalent Pt(2), and two equivalent Pt(7) atoms.