Materials Data on Cu2WSe4 by Materials Project
Cu2WSe4 crystallizes in the tetragonal I-42m space group. The structure is two-dimensional and consists of two Cu2WSe4 sheets oriented in the (0, 0, 1) direction. W6+ is bonded to four equivalent Se2- atoms to form WSe4 tetrahedra that share edges with four equivalent CuSe4 tetrahedra. All W–Se bond lengths are 2.38 Å. Cu1+ is bonded to four equivalent Se2- atoms to form CuSe4 tetrahedra that share corners with four equivalent CuSe4 tetrahedra and edges with two equivalent WSe4 tetrahedra. All Cu–Se bond lengths are 2.44 Å. Se2- is bonded in a 3-coordinate geometry to one W6+ and two equivalent Cu1+ atoms.