CuAsSe2 is Chalcopyrite structured and crystallizes in the tetragonal I-42d space group. Cu(1) is bonded to four equivalent Se(1) atoms to form CuSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra and corners with eight equivalent As(1)Se4 tetrahedra. As(1) is bonded to four equivalent Se(1) atoms to form AsSe4 tetrahedra that share corners with four equivalent As(1)Se4 tetrahedra and corners with eight equivalent Cu(1)Se4 tetrahedra. Se(1) is bonded to two equivalent Cu(1) and two equivalent As(1) atoms to form corner-sharing SeCu2As2 tetrahedra.
CuAsSe2 is Chalcopyrite structured and crystallizes in the tetragonal I-42d space group. Cu(1) is bonded to four equivalent Se(1) atoms to form CuSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra and corners with eight equivalent As(1)Se4 tetrahedra. All Cu(1)-Se(1) bond lengths are 2.43 Å. As(1) is bonded to four equivalent Se(1) atoms to form AsSe4 tetrahedra that share corners with four equivalent As(1)Se4 tetrahedra and corners with eight equivalent Cu(1)Se4 tetrahedra. All As(1)-Se(1) bond lengths are 2.64 Å. Se(1) is bonded to two equivalent Cu(1) and two equivalent As(1) atoms to form corner-sharing SeCu2As2 tetrahedra.