Materials Data on AlCuSnSe4 by Materials Project
CuAlSnSe4 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 AlSe4 tetrahedra and corners with four equivalent SnSe4 tetrahedra. All Cu–Se bond lengths are 2.46 Å. Al3+ is bonded to four equivalent Se2- atoms to form AlSe4 tetrahedra that share corners with four equivalent CuSe4 tetrahedra and corners with four equivalent SnSe4 tetrahedra. All Al–Se bond lengths are 2.43 Å. Sn4+ is bonded to four equivalent Se2- atoms to form SnSe4 tetrahedra that share corners with four equivalent CuSe4 tetrahedra and corners with four equivalent AlSe4 tetrahedra. All Sn–Se bond lengths are 2.60 Å. Se2- is bonded in a trigonal non-coplanar geometry to one Cu1+, one Al3+, and one Sn4+ atom.