CePtGe2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 14-coordinate geometry to four equivalent Pt(1), two equivalent Ge(3), four equivalent Ge(1), and four equivalent Ge(2) atoms. In the second Ce site, Ce(2) is bonded in a 14-coordinate geometry to six equivalent Pt(1), two equivalent Ge(2), and six equivalent Ge(3) atoms. Pt(1) is bonded in a 10-coordinate geometry to two equivalent Ce(1), three equivalent Ce(2), one Ge(1), one Ge(2), and three equivalent Ge(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 7-coordinate geometry to four equivalent Ce(1), two equivalent Pt(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(1), two equivalent Pt(1), and one Ge(2) atom. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Ce(1), three equivalent Ce(2), three equivalent Pt(1), and one Ge(3) atom.
CePtGe2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 14-coordinate geometry to four equivalent Pt(1), two equivalent Ge(3), four equivalent Ge(1), and four equivalent Ge(2) atoms. All Ce(1)-Pt(1) bond lengths are 3.34 Å. Both Ce(1)-Ge(3) bond lengths are 3.41 Å. All Ce(1)-Ge(1) bond lengths are 3.37 Å. All Ce(1)-Ge(2) bond lengths are 3.34 Å. In the second Ce site, Ce(2) is bonded in a 14-coordinate geometry to six equivalent Pt(1), two equivalent Ge(2), and six equivalent Ge(3) atoms. There are two shorter (3.26 Å) and four longer (3.27 Å) Ce(2)-Pt(1) bond lengths. Both Ce(2)-Ge(2) bond lengths are 3.09 Å. There are four shorter (3.06 Å) and two longer (3.07 Å) Ce(2)-Ge(3) bond lengths. Pt(1) is bonded in a 10-coordinate geometry to two equivalent Ce(1), three equivalent Ce(2), one Ge(1), one Ge(2), and three equivalent Ge(3) atoms. The Pt(1)-Ge(1) bond length is 2.52 Å. The Pt(1)-Ge(2) bond length is 2.56 Å. There are two shorter (2.51 Å) and one longer (2.67 Å) Pt(1)-Ge(3) bond length. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 7-coordinate geometry to four equivalent Ce(1), two equivalent Pt(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.43 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(1), two equivalent Pt(1), and one Ge(2) atom. The Ge(2)-Ge(2) bond length is 2.47 Å. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Ce(1), three equivalent Ce(2), three equivalent Pt(1), and one Ge(3) atom. The Ge(3)-Ge(3) bond length is 2.65 Å.