DOI: 10.17188/1759273
title: Materials Data on Rb2U3P6O25 by Materials Project

description: Rb2U3P6O25 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Rb–O bond distances ranging from 3.03–3.56 Å. In the second Rb1+ site, Rb1+ is bonded in a 2-coordinate geometry to eleven O2- atoms. There are a spread of Rb–O bond distances ranging from 2.95–3.53 Å. There are three inequivalent U6+ sites. In the first U6+ site, U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with four PO4 tetrahedra. There are a spread of U–O bond distances ranging from 1.81–2.34 Å. In the second U6+ site, U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with five PO4 tetrahedra. There are a spread of U–O bond distances ranging from 1.80–2.58 Å. In the third U6+ site, U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with five PO4 tetrahedra. There are a spread of U–O bond distances ranging from 1.81–2.49 Å. There are six 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 UO7 pentagonal bipyramids and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one UO6 octahedra, a cornercorner with one UO7 pentagonal bipyramid, and corners with two PO4 tetrahedra. The corner-sharing octahedral tilt angles are 34°. There are a spread of P–O bond distances ranging from 1.49–1.62 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one UO6 octahedra, a cornercorner with one UO7 pentagonal bipyramid, and corners with two PO4 tetrahedra. The corner-sharing octahedral tilt angles are 15°. There are a spread of P–O bond distances ranging from 1.50–1.62 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent UO7 pentagonal bipyramids and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.64 Å. In the fifth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one UO6 octahedra, corners with two UO7 pentagonal bipyramids, and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 8°. There are a spread of P–O bond distances ranging from 1.52–1.63 Å. In the sixth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one UO6 octahedra, corners with two UO7 pentagonal bipyramids, and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 9°. There is three shorter (1.53 Å) and one longer (1.64 Å) P–O bond length. There are twenty-five inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to one Rb1+, one U6+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one U6+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one U6+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one Rb1+ and two P5+ atoms. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one U6+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one U6+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one Rb1+, one U6+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Rb1+ and two P5+ atoms. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Rb1+, one U6+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Rb1+ and two P5+ atoms. In the thirteenth O2- site, O2- is bonded in a single-bond geometry to one Rb1+ and one U6+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Rb1+, one U6+, and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, one U6+, and one P5+ atom. In the sixteenth O2- site, O2- is bonded in a single-bond geometry to one Rb1+ and one U6+ atom. In the seventeenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one P5+ atom. In the eighteenth O2- site, O2- is bonded in a distorted single-bond geometry to two Rb1+ and one U6+ atom. In the nineteenth O2- site, O2- is bonded in a single-bond geometry to one Rb1+ and one U6+ atom. In the twentieth O2- site, O2- is bonded in a single-bond geometry to one Rb1+ and one U6+ atom. In the twenty-first O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+, one U6+, and one P5+ atom. In the twenty-second O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, one U6+, and one P5+ atom. In the twenty-third O2- site, O2- is bonded in a distorted linear geometry to one U6+ and one P5+ atom. In the twenty-fourth O2- site, O2- is bonded in a single-bond geometry to one Rb1+ and one U6+ atom. In the twenty-fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one P5+ atom.