CaGeN2 crystallizes in the tetragonal P4/nmm space group. Ca(1) is bonded to five equivalent N(2) atoms to form a mixture of corner and edge-sharing CaN5 square pyramids. Ge(1) is bonded in a 5-coordinate geometry to one N(2) and four equivalent N(1) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded to four equivalent Ge(1) atoms to form distorted NGe4 trigonal pyramids that share corners with four equivalent N(2)Ca5Ge octahedra, corners with four equivalent N(1)Ge4 trigonal pyramids, and edges with four equivalent N(1)Ge4 trigonal pyramids. The corner-sharing octahedral tilt angles are 66°. In the second N site, N(2) is bonded to five equivalent Ca(1) and one Ge(1) atom to form NCa5Ge octahedra that share corners with four equivalent N(2)Ca5Ge octahedra, corners with four equivalent N(1)Ge4 trigonal pyramids, and edges with eight equivalent N(2)Ca5Ge octahedra. The corner-sharing octahedral tilt angles are 6°.
CaGeN2 crystallizes in the tetragonal P4/nmm space group. Ca(1) is bonded to five equivalent N(2) atoms to form a mixture of corner and edge-sharing CaN5 square pyramids. There is one shorter (2.34 Å) and four longer (2.60 Å) Ca(1)-N(2) bond lengths. Ge(1) is bonded in a 5-coordinate geometry to one N(2) and four equivalent N(1) atoms. The Ge(1)-N(2) bond length is 1.81 Å. All Ge(1)-N(1) bond lengths are 2.00 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded to four equivalent Ge(1) atoms to form distorted NGe4 trigonal pyramids that share corners with four equivalent N(2)Ca5Ge octahedra, corners with four equivalent N(1)Ge4 trigonal pyramids, and edges with four equivalent N(1)Ge4 trigonal pyramids. The corner-sharing octahedral tilt angles are 66°. In the second N site, N(2) is bonded to five equivalent Ca(1) and one Ge(1) atom to form NCa5Ge octahedra that share corners with four equivalent N(2)Ca5Ge octahedra, corners with four equivalent N(1)Ge4 trigonal pyramids, and edges with eight equivalent N(2)Ca5Ge octahedra. The corner-sharing octahedral tilt angles are 6°.