Materials Data on Rb2MoP2O9 by Materials Project

Rb2MoP2O9 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Rb–O bond distances ranging from 2.89–3.09 Å. In the second Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Rb–O bond distances ranging from 2.93–3.55 Å. Mo6+ is bonded to six O2- atoms to form distorted MoO6 octahedra that share corners with four PO4 tetrahedra. There are a spread of Mo–O bond distances ranging from 1.74–2.20 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 two equivalent MoO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 35–37°. There are a spread of P–O bond distances ranging from 1.51–1.62 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent MoO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 40–50°. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, one Mo6+, and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Rb1+, one Mo6+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to three Rb1+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Rb1+, one Mo6+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Rb1+, one Mo6+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to three Rb1+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+ and one Mo6+ atom. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to two Rb1+ and one Mo6+ atom.