PPMn is zeta iron carbide structured and crystallizes in the monoclinic P2/m space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form a mixture of corner and edge-sharing MnP6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. In the second Mn site, Mn(2) is bonded to two equivalent P(2) and four equivalent P(1) atoms to form a mixture of corner and edge-sharing MnP6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 3-coordinate geometry to one Mn(1) and two equivalent Mn(2) atoms. In the second P site, P(2) is bonded in a 3-coordinate geometry to one Mn(2) and two equivalent Mn(1) atoms.
PPMn is zeta iron carbide structured and crystallizes in the monoclinic P2/m space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form a mixture of corner and edge-sharing MnP6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. Both Mn(1)-P(1) bond lengths are 2.38 Å. All Mn(1)-P(2) bond lengths are 2.30 Å. In the second Mn site, Mn(2) is bonded to two equivalent P(2) and four equivalent P(1) atoms to form a mixture of corner and edge-sharing MnP6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. Both Mn(2)-P(2) bond lengths are 2.30 Å. All Mn(2)-P(1) bond lengths are 2.26 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 3-coordinate geometry to one Mn(1) and two equivalent Mn(2) atoms. In the second P site, P(2) is bonded in a 3-coordinate geometry to one Mn(2) and two equivalent Mn(1) atoms.