PmP3 crystallizes in the tetragonal I4/mmm space group. Pm(1) is bonded to four equivalent P(2) and eight equivalent P(1) atoms to form a mixture of face, corner, and edge-sharing PmP12 cuboctahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 8-coordinate geometry to four equivalent Pm(1) and four equivalent P(1) atoms. In the second P site, P(2) is bonded in a square co-planar geometry to four equivalent Pm(1) atoms.
PmP3 crystallizes in the tetragonal I4/mmm space group. Pm(1) is bonded to four equivalent P(2) and eight equivalent P(1) atoms to form a mixture of face, corner, and edge-sharing PmP12 cuboctahedra. All Pm(1)-P(2) bond lengths are 2.80 Å. All Pm(1)-P(1) bond lengths are 3.14 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 8-coordinate geometry to four equivalent Pm(1) and four equivalent P(1) atoms. All P(1)-P(1) bond lengths are 2.80 Å. In the second P site, P(2) is bonded in a square co-planar geometry to four equivalent Pm(1) atoms.