MgPH13O9 crystallizes in the trigonal R3 space group. Mg(1) is bonded in an octahedral geometry to three equivalent O(2) and three equivalent O(3) atoms. P(1) is bonded in a distorted tetrahedral geometry to one H(1) and three equivalent O(1) atoms. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(1) and one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) and one O(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(3) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(1) and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one P(1), one H(2), one H(3), and one H(5) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Mg(1), one H(2), and one H(3) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1), one H(4), and one H(5) atom.
MgPH13O9 crystallizes in the trigonal R3 space group. Mg(1) is bonded in an octahedral geometry to three equivalent O(2) and three equivalent O(3) atoms. All Mg(1)-O(2) bond lengths are 2.14 Å. All Mg(1)-O(3) bond lengths are 2.08 Å. P(1) is bonded in a distorted tetrahedral geometry to one H(1) and three equivalent O(1) atoms. The P(1)-H(1) bond length is 1.41 Å. All P(1)-O(1) bond lengths are 1.55 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(1) and one O(2) atom. The H(2)-O(1) bond length is 1.67 Å. The H(2)-O(2) bond length is 1.01 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) and one O(2) atom. The H(3)-O(1) bond length is 1.70 Å. The H(3)-O(2) bond length is 1.00 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(3) atom. The H(4)-O(3) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(1) and one O(3) atom. The H(5)-O(1) bond length is 1.73 Å. The H(5)-O(3) bond length is 1.00 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one P(1), one H(2), one H(3), and one H(5) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Mg(1), one H(2), and one H(3) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1), one H(4), and one H(5) atom.