Figure 2 The [Mg(OH2)6] octahedron with six surrounding PO4 tetrahedra emphasizing the hydrogen bonding scheme (green dashed lines). The anisotropic displacement parameters are given at the 74% probability level. H atoms are given as spheres of arbitrary radius. [Symmetry codes: (i) y, x, z + ; (ii) -x + 1, -y + 1, -z + 1.]