MnP4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent P(1), two equivalent P(3), and two equivalent P(4) atoms to form edge-sharing MnP6 octahedra. In the second Mn site, Mn(2) is bonded to two equivalent P(1), two equivalent P(2), and two equivalent P(4) atoms to form edge-sharing MnP6 octahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(2), one P(1), and one P(2) atom. In the second P site, P(2) is bonded in a distorted single-bond geometry to one Mn(2), one P(1), one P(2), and one P(3) atom. In the third P site, P(3) is bonded in a distorted single-bond geometry to one Mn(1), one P(2), one P(3), and one P(4) atom. In the fourth P site, P(4) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(2), one P(3), and one P(4) atom.
MnP4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent P(1), two equivalent P(3), and two equivalent P(4) atoms to form edge-sharing MnP6 octahedra. Both Mn(1)-P(1) bond lengths are 2.36 Å. Both Mn(1)-P(3) bond lengths are 2.23 Å. Both Mn(1)-P(4) bond lengths are 2.31 Å. In the second Mn site, Mn(2) is bonded to two equivalent P(1), two equivalent P(2), and two equivalent P(4) atoms to form edge-sharing MnP6 octahedra. Both Mn(2)-P(1) bond lengths are 2.32 Å. Both Mn(2)-P(2) bond lengths are 2.26 Å. Both Mn(2)-P(4) bond lengths are 2.29 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(2), one P(1), and one P(2) atom. The P(1)-P(1) bond length is 2.23 Å. The P(1)-P(2) bond length is 2.21 Å. In the second P site, P(2) is bonded in a distorted single-bond geometry to one Mn(2), one P(1), one P(2), and one P(3) atom. The P(2)-P(2) bond length is 2.20 Å. The P(2)-P(3) bond length is 2.25 Å. In the third P site, P(3) is bonded in a distorted single-bond geometry to one Mn(1), one P(2), one P(3), and one P(4) atom. The P(3)-P(3) bond length is 2.32 Å. The P(3)-P(4) bond length is 2.22 Å. In the fourth P site, P(4) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(2), one P(3), and one P(4) atom. The P(4)-P(4) bond length is 2.21 Å.