Materials Data on Gd(BiO2)4 by Materials Project

Abstract

Gd(BiO2)4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. Gd3+ is bonded to seven O2- atoms to form distorted GdO7 pentagonal bipyramids that share a cornercorner with one BiO6 octahedra, edges with two equivalent BiO6 octahedra, edges with two equivalent GdO7 pentagonal bipyramids, and edges with two equivalent BiO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 41°. There are a spread of Gd–O bond distances ranging from 2.34–2.47 Å. There are four inequivalent Bi+3.25+ sites. In the first Bi+3.25+ site, Bi+3.25+ is bonded to six O2- atoms to form BiO6 octahedra that share a cornercorner with one GdO7 pentagonal bipyramid, a cornercorner with one BiO7 pentagonal bipyramid, edges with two equivalent BiO6 octahedra, edges with two equivalent GdO7 pentagonal bipyramids, and edges with two equivalent BiO7 pentagonal bipyramids. There are a spread of Bi–O bond distances ranging from 2.23–2.34 Å. In the second Bi+3.25+ site, Bi+3.25+ is bonded to seven O2- atoms to form distorted BiO7 pentagonal bipyramids that share a cornercorner with one BiO6 octahedra, edges with two equivalent BiO6 octahedra, edges with two equivalent GdO7 pentagonal bipyramids, and edges with two equivalent BiO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. There are a spread of Bi–O bond distances ranging from 2.35–2.61 Å. In the third Bi+3.25+ site, Bi+3.25+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.23–2.55 Å. In the fourth Bi+3.25+ site, Bi+3.25+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.23–2.55 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Gd3+ and two Bi+3.25+ atoms to form OGd2Bi2 tetrahedra that share corners with thirteen OGd2Bi2 tetrahedra and edges with five OGdBi3 tetrahedra. In the second O2- site, O2- is bonded to one Gd3+ and three Bi+3.25+ atoms to form a mixture of distorted edge and corner-sharing OGdBi3 tetrahedra. In the third O2- site, O2- is bonded to four Bi+3.25+ atoms to form distorted OBi4 tetrahedra that share corners with thirteen OGd2Bi2 tetrahedra and edges with four OGdBi3 tetrahedra. In the fourth O2- site, O2- is bonded to one Gd3+ and three Bi+3.25+ atoms to form distorted OGdBi3 tetrahedra that share corners with thirteen OGd2Bi2 tetrahedra and edges with five OBi4 tetrahedra. In the fifth O2- site, O2- is bonded to one Gd3+ and three Bi+3.25+ atoms to form OGdBi3 tetrahedra that share corners with eleven OGd2Bi2 tetrahedra and edges with five OBi4 tetrahedra. In the sixth O2- site, O2- is bonded to four Bi+3.25+ atoms to form OBi4 tetrahedra that share corners with eleven OGd2Bi2 tetrahedra and edges with five OGdBi3 tetrahedra. In the seventh O2- site, O2- is bonded to four Bi+3.25+ atoms to form OBi4 tetrahedra that share corners with fourteen OGd2Bi2 tetrahedra and edges with four OGdBi3 tetrahedra. In the eighth O2- site, O2- is bonded to two equivalent Gd3+ and two Bi+3.25+ atoms to form distorted OGd2Bi2 tetrahedra that share corners with fourteen OGd2Bi2 tetrahedra and edges with four OGdBi3 tetrahedra.