DOI: 10.17188/1682893
title: Materials Data on Ba5AlRu2O11 by Materials Project

description: Ba5Ru2AlO11 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are five inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.77–3.14 Å. In the second Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.73–3.06 Å. In the third Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.72–2.95 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.61–3.17 Å. In the fifth Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.56–3.17 Å. There are two inequivalent Ru+4.50+ sites. In the first Ru+4.50+ site, Ru+4.50+ is bonded to six O2- atoms to form face-sharing RuO6 octahedra. There are a spread of Ru–O bond distances ranging from 1.93–2.09 Å. In the second Ru+4.50+ site, Ru+4.50+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with two equivalent AlO4 tetrahedra and a faceface with one RuO6 octahedra. There are a spread of Ru–O bond distances ranging from 1.91–2.08 Å. Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with two equivalent RuO6 octahedra. The corner-sharing octahedral tilt angles are 12°. There are a spread of Al–O bond distances ranging from 1.76–1.78 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two Ru+4.50+ atoms. In the second O2- site, O2- is bonded to four Ba2+ and two Ru+4.50+ atoms to form distorted OBa4Ru2 octahedra that share corners with two equivalent OBa4Ru2 octahedra, corners with two OBa4Ru square pyramids, and edges with two equivalent OBa4Ru2 octahedra. The corner-sharing octahedral tilt angles are 6°. In the third O2- site, O2- is bonded in a 1-coordinate geometry to five Ba2+ and one Ru+4.50+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to five Ba2+ and one Ru+4.50+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to four Ba2+, one Ru+4.50+, and one Al3+ atom. In the sixth O2- site, O2- is bonded to four Ba2+ and one Ru+4.50+ atom to form distorted OBa4Ru square pyramids that share a cornercorner with one OBa4Ru2 octahedra, corners with two equivalent OBa4Ru square pyramids, and edges with two equivalent OBa4Al square pyramids. The corner-sharing octahedral tilt angles are 5°. In the seventh O2- site, O2- is bonded to four Ba2+ and one Al3+ atom to form distorted OBa4Al square pyramids that share a cornercorner with one OBa4Ru2 octahedra, corners with two equivalent OBa4Al square pyramids, and edges with two equivalent OBa4Ru square pyramids. The corner-sharing octahedral tilt angles are 40°. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to four Ba2+ and one Al3+ atom.