CaPtGe2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(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 Ca site, Ca(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 Ca(1), three equivalent Ca(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 2-coordinate geometry to four equivalent Ca(1) and two equivalent Pt(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ca(2), four equivalent Ca(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 Ca(1), three equivalent Ca(2), three equivalent Pt(1), and one Ge(3) atom.
CaPtGe2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(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 Ca(1)-Pt(1) bond lengths are 3.26 Å. Both Ca(1)-Ge(3) bond lengths are 3.31 Å. All Ca(1)-Ge(1) bond lengths are 3.39 Å. All Ca(1)-Ge(2) bond lengths are 3.34 Å. In the second Ca site, Ca(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 four shorter (3.25 Å) and two longer (3.27 Å) Ca(2)-Pt(1) bond lengths. Both Ca(2)-Ge(2) bond lengths are 3.03 Å. There are four shorter (3.04 Å) and two longer (3.11 Å) Ca(2)-Ge(3) bond lengths. Pt(1) is bonded in a 10-coordinate geometry to two equivalent Ca(1), three equivalent Ca(2), one Ge(1), one Ge(2), and three equivalent Ge(3) atoms. The Pt(1)-Ge(1) bond length is 2.50 Å. The Pt(1)-Ge(2) bond length is 2.51 Å. There are two shorter (2.52 Å) and one longer (2.64 Å) Pt(1)-Ge(3) bond length. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 2-coordinate geometry to four equivalent Ca(1) and two equivalent Pt(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ca(2), four equivalent Ca(1), two equivalent Pt(1), and one Ge(2) atom. The Ge(2)-Ge(2) bond length is 2.41 Å. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Ca(1), three equivalent Ca(2), three equivalent Pt(1), and one Ge(3) atom. The Ge(3)-Ge(3) bond length is 2.64 Å.