DOI: 10.17188/1301237
title: Materials Data on Ba9Rh8O27 by Materials Project

description: Ba9Rh8O27 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eighteen inequivalent Ba sites. In the first Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.33 Å. In the second Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.66–3.35 Å. In the third Ba site, Ba is bonded in a 10-coordinate geometry to ten O atoms. There are a spread of Ba–O bond distances ranging from 2.71–3.05 Å. In the fourth Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.34 Å. In the fifth Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.75–3.37 Å. In the sixth Ba site, Ba is bonded to twelve O atoms to form distorted BaO12 cuboctahedra that share corners with six RhO6 octahedra, faces with two BaO12 cuboctahedra, and faces with five RhO6 octahedra. The corner-sharing octahedra tilt angles range from 6–31°. There are a spread of Ba–O bond distances ranging from 2.71–3.18 Å. In the seventh Ba site, Ba is bonded in a 11-coordinate geometry to eleven O atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.22 Å. In the eighth Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.38 Å. In the ninth Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.43 Å. In the tenth Ba site, Ba is bonded in a 11-coordinate geometry to eleven O atoms. There are a spread of Ba–O bond distances ranging from 2.78–3.26 Å. In the eleventh Ba site, Ba is bonded in a 11-coordinate geometry to eleven O atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.27 Å. In the twelfth Ba site, Ba is bonded to twelve O atoms to form distorted BaO12 cuboctahedra that share a cornercorner with one BaO12 cuboctahedra, corners with three RhO6 octahedra, a faceface with one BaO12 cuboctahedra, and faces with six RhO6 octahedra. The corner-sharing octahedra tilt angles range from 8–17°. There are a spread of Ba–O bond distances ranging from 2.87–3.31 Å. In the thirteenth Ba site, Ba is bonded in a 11-coordinate geometry to eleven O atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.09 Å. In the fourteenth Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.71–3.33 Å. In the fifteenth Ba site, Ba is bonded to twelve O atoms to form distorted BaO12 cuboctahedra that share a cornercorner with one BaO12 cuboctahedra, corners with two RhO6 octahedra, a faceface with one BaO12 cuboctahedra, and faces with six RhO6 octahedra. The corner-sharing octahedra tilt angles range from 12–13°. There are a spread of Ba–O bond distances ranging from 2.71–3.19 Å. In the sixteenth Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.65–3.33 Å. In the seventeenth Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.73–3.36 Å. In the eighteenth Ba site, Ba is bonded in a 12-coordinate geometry to twelve O atoms. There are a spread of Ba–O bond distances ranging from 2.75–3.39 Å. There are sixteen inequivalent Rh sites. In the first Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, a faceface with one BaO12 cuboctahedra, and a faceface with one RhO6 octahedra. There are a spread of Rh–O bond distances ranging from 1.89–2.10 Å. In the second Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share corners with three RhO6 octahedra, faces with two BaO12 cuboctahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 10–20°. There are a spread of Rh–O bond distances ranging from 2.00–2.06 Å. In the third Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, a faceface with one BaO12 cuboctahedra, and faces with two RhO6 octahedra. There are a spread of Rh–O bond distances ranging from 2.00–2.05 Å. In the fourth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, a faceface with one BaO12 cuboctahedra, and faces with two RhO6 octahedra. There are a spread of Rh–O bond distances ranging from 2.02–2.05 Å. In the fifth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, corners with two RhO6 octahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 18–21°. There are a spread of Rh–O bond distances ranging from 1.91–2.08 Å. In the sixth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, corners with two RhO6 octahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 15–23°. There are a spread of Rh–O bond distances ranging from 1.92–2.08 Å. In the seventh Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, a faceface with one BaO12 cuboctahedra, and faces with two RhO6 octahedra. There are a spread of Rh–O bond distances ranging from 2.01–2.06 Å. In the eighth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, a faceface with one BaO12 cuboctahedra, and faces with two RhO6 octahedra. There are a spread of Rh–O bond distances ranging from 2.01–2.06 Å. In the ninth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, corners with three RhO6 octahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 15–23°. There are a spread of Rh–O bond distances ranging from 1.99–2.05 Å. In the tenth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, corners with three RhO6 octahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 15–19°. There are a spread of Rh–O bond distances ranging from 2.01–2.04 Å. In the eleventh Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share corners with two RhO6 octahedra, faces with three BaO12 cuboctahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 9–10°. There are a spread of Rh–O bond distances ranging from 1.93–2.07 Å. In the twelfth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share corners with two RhO6 octahedra, faces with two BaO12 cuboctahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 20–21°. There are a spread of Rh–O bond distances ranging from 1.91–2.08 Å. In the thirteenth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share corners with two RhO6 octahedra, faces with two BaO12 cuboctahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 20–21°. There are a spread of Rh–O bond distances ranging from 1.92–2.09 Å. In the fourteenth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share corners with three RhO6 octahedra, faces with two BaO12 cuboctahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 9–21°. There are a spread of Rh–O bond distances ranging from 2.00–2.04 Å. In the fifteenth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, a faceface with one BaO12 cuboctahedra, and a faceface with one RhO6 octahedra. There are a spread of Rh–O bond distances ranging from 1.90–2.11 Å. In the sixteenth Rh site, Rh is bonded to six O atoms to form RhO6 octahedra that share a cornercorner with one BaO12 cuboctahedra, corners with two RhO6 octahedra, and a faceface with one RhO6 octahedra. The corner-sharing octahedra tilt angles range from 15–19°. There are a spread of Rh–O bond distances ranging from 1.92–2.06 Å. There are fifty-four inequivalent O sites. In the first O site, O is bonded to four Ba and one Rh atom to form distorted OBa4Rh trigonal bipyramids that share corners with four OBa4Rh2 octahedra, an edgeedge with one OBa4Rh2 octahedra, an edgeedge with one OBa4Rh trigonal bipyramid, and faces with two OBa4Rh2 octahedra. The corner-sharing octahedra tilt angles range from 3–62°. In the second O site, O is bonded in a 1-coordinate geometry to four Ba and one Rh atom. In the third O site, O is bonded in a 2-coordinate geometry to four Ba and two Rh atoms. In the fourth O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the fifth O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the sixth O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the seventh O site, O is bonded to four Ba and two Rh atoms to form distorted OBa4Rh2 octahedra that share corners with three OBa4Rh2 octahedra, faces with two OBa4Rh2 octahedra, and faces with two OBa4Rh trigonal bipyramids. The corner-sharing octahedra tilt angles range from 55–57°. In the eighth O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the ninth O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the tenth O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the eleventh O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the twelfth O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the thirteenth O site, O is bonded in a 2-coordinate geometry to four Ba and two Rh atoms. In the fourteenth O site, O is bonded in a 2-coordinate geometry to four Ba and two Rh atoms. In the fifteenth O site, O is bonded in a 5-coordinate geometry to four Ba and one Rh atom. In the sixteenth O site, O is bonded in a 2-coordinate geometry to three Ba and two Rh atoms. In the seventeenth O site, O is bonded in a 4-coordinate geometry to three Ba and two Rh atoms. In the eighteenth O site, O is bonded in a 5-coordinate geometry to three Ba and two Rh atoms. In the nineteenth O site, O is bonded in a 5-coordinate geometry to three Ba and two Rh atoms. In the twentieth O site, O is bonded in a 2-coordinate geometry to four Ba and two Rh atoms. In the twenty-first O site, O is bonded to three Ba and two Rh atoms to form distorted corner-sharing OBa3Rh2 square pyramids. In the twenty-second O site, O is bonded in a 6-coordinate geometry to four Ba and two Rh atoms. In the twenty-third O site, O is bonded in a 5-coordinate geometry to four Ba and two Rh atoms. In the twenty-fourth O site, O is bonded in a 2-coordinate geometry to four Ba and two Rh atoms. In the twenty-fifth O site, O is bonded in a 5-coordinate geometry to four Ba and two Rh atoms. In the twenty-sixth O site, O is bonded to four Ba and two Rh atoms to form distorted OBa4Rh2 octahedra that share corners with two OBa4Rh2 octahedra, a cornercorner with one OBa4Rh trigonal bipyramid, an edgeedge with one OBa4Rh trigonal bipyramid, and faces with three OBa4Rh2 octahedra. The corner-sharing octahedra tilt angles range from 1–60°. In the twenty-seventh O site, O is bonded to four Ba and two Rh atoms to form distorted OBa4Rh2 octahedra that share corners with two OBa4Rh2 octahedra, a cornercorner with one OBa4Rh trigonal bipyramid, an edgeedge with one OBa4Rh2 octahedra, an edgeedge with one OBa4Rh trigonal bipyramid, and faces wit