Mg2P crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent P(1) atoms to form a mixture of distorted corner and edge-sharing MgP4 trigonal pyramids. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to four equivalent P(1) atoms. P(1) is bonded in a 8-coordinate geometry to four equivalent Mg(1) and four equivalent Mg(2) atoms.
Mg2P crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent P(1) atoms to form a mixture of distorted corner and edge-sharing MgP4 trigonal pyramids. There are a spread of Mg(1)-P(1) bond distances ranging from 2.58-2.83 Å. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to four equivalent P(1) atoms. There are two shorter (2.81 Å) and two longer (2.84 Å) Mg(2)-P(1) bond lengths. P(1) is bonded in a 8-coordinate geometry to four equivalent Mg(1) and four equivalent Mg(2) atoms.