Mg2P crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted square co-planar geometry to four equivalent P(1) atoms. 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 orthorhombic Cmcm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted square co-planar geometry to four equivalent P(1) atoms. All Mg(1)-P(1) bond lengths are 2.72 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 (2.64 Å) and two longer (2.91 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.