Materials Data on Mn3(PO7)2 by Materials Project
Mn3(PO7)2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are three inequivalent Mn6+ sites. In the first Mn6+ site, Mn6+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four PO4 tetrahedra and edges with two equivalent MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.89–2.05 Å. In the second Mn6+ site, Mn6+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four PO4 tetrahedra and edges with two equivalent MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.89–2.09 Å. In the third Mn6+ site, Mn6+ is bonded in a 5-coordinate geometry to six O2- atoms. There are a spread of Mn–O bond distances ranging from 1.61–2.24 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 four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 47–54°. There are a spread of P–O bond distances ranging from 1.54–1.60 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 48–54°. There are a spread of P–O bond distances ranging from 1.52–1.61 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Mn6+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one Mn6+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one Mn6+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Mn6+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Mn6+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Mn6+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to two Mn6+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Mn6+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to one Mn6+ and one P5+ atom. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to one Mn6+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Mn6+ and one P5+ atom. In the twelfth O2- site, O2- is bonded in a water-like geometry to two Mn6+ atoms. In the thirteenth O2- site, O2- is bonded in a water-like geometry to two Mn6+ atoms. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Mn6+ atom.