CaNiGe2 crystallizes in the orthorhombic Cmcm space group. Ca(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), four equivalent Ge(1), and six equivalent Ge(2) atoms. Ni(1) is bonded in a 9-coordinate geometry to four equivalent Ca(1), one Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to four equivalent Ca(1) and four equivalent Ni(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to six equivalent Ca(1), one Ni(1), and two equivalent Ge(2) atoms.
CaNiGe2 crystallizes in the orthorhombic Cmcm space group. Ca(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), four equivalent Ge(1), and six equivalent Ge(2) atoms. All Ca(1)-Ni(1) bond lengths are 3.16 Å. There are two shorter (3.15 Å) and two longer (3.20 Å) Ca(1)-Ge(1) bond lengths. There are four shorter (3.13 Å) and two longer (3.34 Å) Ca(1)-Ge(2) bond lengths. Ni(1) is bonded in a 9-coordinate geometry to four equivalent Ca(1), one Ge(2), and four equivalent Ge(1) atoms. The Ni(1)-Ge(2) bond length is 2.32 Å. There are two shorter (2.37 Å) and two longer (2.43 Å) Ni(1)-Ge(1) bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to four equivalent Ca(1) and four equivalent Ni(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to six equivalent Ca(1), one Ni(1), and two equivalent Ge(2) atoms. Both Ge(2)-Ge(2) bond lengths are 2.50 Å.