Materials Data on MgP3NO9 by Materials Project

(Mg(PO3)3)2N2 crystallizes in the hexagonal P-6c2 space group. The structure is three-dimensional and consists of two ammonia molecules and one Mg(PO3)3 framework. In the Mg(PO3)3 framework, Mg2+ is bonded to six equivalent O2- atoms to form MgO6 octahedra that share corners with six equivalent PO4 tetrahedra. All Mg–O bond lengths are 2.08 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent MgO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 39°. There is two shorter (1.50 Å) and two longer (1.61 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Mg2+ and one P5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent P5+ atoms.