PPSe crystallizes in the tetragonal I4_1/amd space group. P(1) is bonded to four equivalent P(1) and two equivalent Se(1) atoms to form a mixture of distorted face and corner-sharing PP4Se2 octahedra. The corner-sharing octahedral tilt angles range from 0-76°. Se(1) is bonded in a 4-coordinate geometry to four equivalent P(1) atoms.
PPSe crystallizes in the tetragonal I4_1/amd space group. P(1) is bonded to four equivalent P(1) and two equivalent Se(1) atoms to form a mixture of distorted face and corner-sharing PP4Se2 octahedra. The corner-sharing octahedral tilt angles range from 0-76°. All P(1)-P(1) bond lengths are 2.63 Å. Both P(1)-Se(1) bond lengths are 2.52 Å. Se(1) is bonded in a 4-coordinate geometry to four equivalent P(1) atoms.