CsMgP(H6O5)2 crystallizes in the cubic F-43m space group. Cs(1) is bonded to twelve equivalent O(1) atoms to form distorted CsO12 cuboctahedra that share corners with twelve equivalent Cs(1)O12 cuboctahedra and faces with four equivalent Mg(1)O6 octahedra. Mg(1) is bonded to six equivalent O(1) atoms to form MgO6 octahedra that share faces with four equivalent Cs(1)O12 cuboctahedra. P(1) is bonded in a tetrahedral geometry to four equivalent O(2) atoms. H(1) is bonded in a distorted single-bond geometry to one O(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Cs(1), one Mg(1), and two equivalent H(1) atoms. In the second O site, O(2) is bonded to one P(1) and three equivalent H(1) atoms to form distorted corner-sharing OPH3 tetrahedra.
CsMgP(H6O5)2 crystallizes in the cubic F-43m space group. Cs(1) is bonded to twelve equivalent O(1) atoms to form distorted CsO12 cuboctahedra that share corners with twelve equivalent Cs(1)O12 cuboctahedra and faces with four equivalent Mg(1)O6 octahedra. All Cs(1)-O(1) bond lengths are 3.61 Å. Mg(1) is bonded to six equivalent O(1) atoms to form MgO6 octahedra that share faces with four equivalent Cs(1)O12 cuboctahedra. All Mg(1)-O(1) bond lengths are 2.08 Å. P(1) is bonded in a tetrahedral geometry to four equivalent O(2) atoms. All P(1)-O(2) bond lengths are 1.56 Å. H(1) is bonded in a distorted single-bond geometry to one O(1) and one O(2) atom. The H(1)-O(1) bond length is 1.01 Å. The H(1)-O(2) bond length is 1.67 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Cs(1), one Mg(1), and two equivalent H(1) atoms. In the second O site, O(2) is bonded to one P(1) and three equivalent H(1) atoms to form distorted corner-sharing OPH3 tetrahedra.