CaBe2Ge2 crystallizes in the tetragonal P4/nmm space group. Ca(1) is bonded in a 16-coordinate geometry to four equivalent Be(1), four equivalent Be(2), four equivalent Ge(1), and four equivalent Ge(2) atoms. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a 5-coordinate geometry to four equivalent Ca(1), one Ge(2), and four equivalent Ge(1) atoms. In the second Be site, Be(2) is bonded to four equivalent Ca(1) and four equivalent Ge(2) atoms to form distorted BeCa4Ge4 tetrahedra that share corners with twelve equivalent Ge(1)Ca4Be4 tetrahedra, edges with two equivalent Ge(1)Ca4Be4 tetrahedra, edges with four equivalent Be(2)Ca4Ge4 tetrahedra, and faces with four equivalent Be(2)Ca4Ge4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent Ca(1) and four equivalent Be(1) atoms to form distorted GeCa4Be4 tetrahedra that share corners with twelve equivalent Be(2)Ca4Ge4 tetrahedra, edges with two equivalent Be(2)Ca4Ge4 tetrahedra, edges with four equivalent Ge(1)Ca4Be4 tetrahedra, and faces with four equivalent Ge(1)Ca4Be4 tetrahedra. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent Ca(1), one Be(1), and four equivalent Be(2) atoms.
CaBe2Ge2 crystallizes in the tetragonal P4/nmm space group. Ca(1) is bonded in a 16-coordinate geometry to four equivalent Be(1), four equivalent Be(2), four equivalent Ge(1), and four equivalent Ge(2) atoms. All Ca(1)-Be(1) bond lengths are 3.08 Å. All Ca(1)-Be(2) bond lengths are 3.16 Å. All Ca(1)-Ge(1) bond lengths are 3.22 Å. All Ca(1)-Ge(2) bond lengths are 3.06 Å. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a 5-coordinate geometry to four equivalent Ca(1), one Ge(2), and four equivalent Ge(1) atoms. The Be(1)-Ge(2) bond length is 2.30 Å. All Be(1)-Ge(1) bond lengths are 2.42 Å. In the second Be site, Be(2) is bonded to four equivalent Ca(1) and four equivalent Ge(2) atoms to form distorted BeCa4Ge4 tetrahedra that share corners with twelve equivalent Ge(1)Ca4Be4 tetrahedra, edges with two equivalent Ge(1)Ca4Be4 tetrahedra, edges with four equivalent Be(2)Ca4Ge4 tetrahedra, and faces with four equivalent Be(2)Ca4Ge4 tetrahedra. All Be(2)-Ge(2) bond lengths are 2.40 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent Ca(1) and four equivalent Be(1) atoms to form distorted GeCa4Be4 tetrahedra that share corners with twelve equivalent Be(2)Ca4Ge4 tetrahedra, edges with two equivalent Be(2)Ca4Ge4 tetrahedra, edges with four equivalent Ge(1)Ca4Be4 tetrahedra, and faces with four equivalent Ge(1)Ca4Be4 tetrahedra. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent Ca(1), one Be(1), and four equivalent Be(2) atoms.