CaGe2 is alpha boron-derived structured and crystallizes in the hexagonal P6_3mc space group. Ca(1) is bonded in a 7-coordinate geometry to three equivalent 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 7-coordinate geometry to four equivalent Ca(1) and three equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 6-coordinate geometry to three equivalent Ca(1) and three equivalent Ge(1) atoms.
CaGe2 is alpha boron-derived structured and crystallizes in the hexagonal P6_3mc space group. Ca(1) is bonded in a 7-coordinate geometry to three equivalent Ge(2) and four equivalent Ge(1) atoms. All Ca(1)-Ge(2) bond lengths are 3.13 Å. There are three shorter (3.00 Å) and one longer (3.17 Å) Ca(1)-Ge(1) bond length. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 7-coordinate geometry to four equivalent Ca(1) and three equivalent Ge(2) atoms. All Ge(1)-Ge(2) bond lengths are 2.54 Å. In the second Ge site, Ge(2) is bonded in a 6-coordinate geometry to three equivalent Ca(1) and three equivalent Ge(1) atoms.