Mg(BeP)2 crystallizes in the trigonal P-3m1 space group. Mg(1) is bonded to six equivalent P(1) atoms to form MgP6 octahedra that share corners with twelve equivalent Be(1)P4 tetrahedra, edges with six equivalent Mg(1)P6 octahedra, and edges with six equivalent Be(1)P4 tetrahedra. Be(1) is bonded to four equivalent P(1) atoms to form BeP4 tetrahedra that share corners with six equivalent Mg(1)P6 octahedra, corners with six equivalent Be(1)P4 tetrahedra, edges with three equivalent Mg(1)P6 octahedra, and edges with three equivalent Be(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 21-52°. P(1) is bonded in a 7-coordinate geometry to three equivalent Mg(1) and four equivalent Be(1) atoms.
Mg(BeP)2 crystallizes in the trigonal P-3m1 space group. Mg(1) is bonded to six equivalent P(1) atoms to form MgP6 octahedra that share corners with twelve equivalent Be(1)P4 tetrahedra, edges with six equivalent Mg(1)P6 octahedra, and edges with six equivalent Be(1)P4 tetrahedra. All Mg(1)-P(1) bond lengths are 2.68 Å. Be(1) is bonded to four equivalent P(1) atoms to form BeP4 tetrahedra that share corners with six equivalent Mg(1)P6 octahedra, corners with six equivalent Be(1)P4 tetrahedra, edges with three equivalent Mg(1)P6 octahedra, and edges with three equivalent Be(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 21-52°. There are three shorter (2.21 Å) and one longer (2.23 Å) Be(1)-P(1) bond length. P(1) is bonded in a 7-coordinate geometry to three equivalent Mg(1) and four equivalent Be(1) atoms.