Materials Data on Ga2P2H4NO8 by Materials Project
(GaPO4)2NH4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional and consists of eight ammonium molecules and one GaPO4 framework. In the GaPO4 framework, there are two inequivalent Ga+2.50+ sites. In the first Ga+2.50+ site, Ga+2.50+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Ga–O bond distances ranging from 1.96–2.16 Å. In the second Ga+2.50+ site, Ga+2.50+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Ga–O bond distances ranging from 1.80–1.86 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent GaO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.53–1.57 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one GaO4 tetrahedra. There is three shorter (1.55 Å) and one longer (1.58 Å) P–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Ga+2.50+ and one P5+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Ga+2.50+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Ga+2.50+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ga+2.50+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ga+2.50+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ga+2.50+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Ga+2.50+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ga+2.50+ and one P5+ atom.