Ca2Mg(PO5)2 crystallizes in the triclinic P-1 space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(4), one O(5), two equivalent O(2), and two equivalent O(3) atoms. Mg(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Ca(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Ca(1), one Mg(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mg(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ca(1) and one Mg(1) atom.
Ca2Mg(PO5)2 crystallizes in the triclinic P-1 space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(4), one O(5), two equivalent O(2), and two equivalent O(3) atoms. The Ca(1)-O(1) bond length is 2.39 Å. The Ca(1)-O(4) bond length is 2.43 Å. The Ca(1)-O(5) bond length is 2.39 Å. There is one shorter (2.37 Å) and one longer (2.38 Å) Ca(1)-O(2) bond length. There is one shorter (2.50 Å) and one longer (2.86 Å) Ca(1)-O(3) bond length. Mg(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra. Both Mg(1)-O(3) bond lengths are 2.13 Å. Both Mg(1)-O(4) bond lengths are 2.08 Å. Both Mg(1)-O(5) bond lengths are 2.10 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. The P(1)-O(1) bond length is 1.57 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.56 Å. The P(1)-O(4) bond length is 1.56 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Ca(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Ca(1), one Mg(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mg(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ca(1) and one Mg(1) atom.