Materials Data on GaCuGeSe4 by Materials Project
CuGaGeSe4 crystallizes in the tetragonal I-4 space group. The structure is three-dimensional. Cu1+ is bonded to four equivalent Se2- atoms to form CuSe4 tetrahedra that share corners with four equivalent GaSe4 tetrahedra and corners with four equivalent GeSe4 tetrahedra. All Cu–Se bond lengths are 2.45 Å. Ga3+ is bonded to four equivalent Se2- atoms to form GaSe4 tetrahedra that share corners with four equivalent CuSe4 tetrahedra and corners with four equivalent GeSe4 tetrahedra. All Ga–Se bond lengths are 2.46 Å. Ge4+ is bonded to four equivalent Se2- atoms to form GeSe4 tetrahedra that share corners with four equivalent CuSe4 tetrahedra and corners with four equivalent GaSe4 tetrahedra. All Ge–Se bond lengths are 2.43 Å. Se2- is bonded in a trigonal non-coplanar geometry to one Cu1+, one Ga3+, and one Ge4+ atom.