DOI: 10.17188/1271961
title: Materials Data on Ba17Er16Zn8Pt4O57 by Materials Project

description: Ba17Er16Pt4Zn8O57 crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. there are five inequivalent Ba sites. In the first Ba site, Ba is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of Ba–O bond distances ranging from 2.62–3.10 Å. In the second 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 2.74–3.26 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 2.86–3.34 Å. In the fourth Ba site, Ba is bonded in a 6-coordinate geometry to ten O atoms. There are a spread of Ba–O bond distances ranging from 2.74–3.33 Å. In the fifth Ba site, Ba is bonded in a distorted q6 geometry to ten O atoms. There are two shorter (2.87 Å) and eight longer (2.93 Å) Ba–O bond lengths. There are four inequivalent Er sites. In the first Er site, Er is bonded to seven O atoms to form distorted ErO7 pentagonal bipyramids that share corners with two equivalent ZnO5 trigonal bipyramids, edges with three ErO7 pentagonal bipyramids, an edgeedge with one ZnO5 trigonal bipyramid, and a faceface with one PtO6 octahedra. There are a spread of Er–O bond distances ranging from 2.27–2.39 Å. In the second Er site, Er is bonded to seven O atoms to form distorted ErO7 pentagonal bipyramids that share a cornercorner with one ErO7 pentagonal bipyramid, corners with two equivalent ZnO5 trigonal bipyramids, an edgeedge with one ErO7 pentagonal bipyramid, edges with two equivalent ZnO5 trigonal bipyramids, and faces with two equivalent ErO7 pentagonal bipyramids. There are a spread of Er–O bond distances ranging from 2.28–2.43 Å. In the third Er site, Er is bonded to seven O atoms to form distorted ErO7 pentagonal bipyramids that share corners with two equivalent PtO6 octahedra, edges with two equivalent ErO7 pentagonal bipyramids, edges with two equivalent ZnO5 trigonal bipyramids, and a faceface with one PtO6 octahedra. The corner-sharing octahedral tilt angles are 12°. There are a spread of Er–O bond distances ranging from 2.22–2.53 Å. In the fourth Er site, Er is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of Er–O bond distances ranging from 2.29–2.47 Å. Pt is bonded to six O atoms to form PtO6 octahedra that share corners with two equivalent ErO7 pentagonal bipyramids, corners with two equivalent ZnO5 trigonal bipyramids, and faces with two ErO7 pentagonal bipyramids. There are a spread of Pt–O bond distances ranging from 2.05–2.11 Å. There are two inequivalent Zn sites. In the first Zn site, Zn is bonded to five O atoms to form distorted ZnO5 trigonal bipyramids that share corners with two equivalent PtO6 octahedra and edges with three ErO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 12°. There are a spread of Zn–O bond distances ranging from 1.96–2.15 Å. In the second Zn site, Zn is bonded to five O atoms to form distorted ZnO5 trigonal bipyramids that share corners with four ErO7 pentagonal bipyramids and edges with two equivalent ErO7 pentagonal bipyramids. There are a spread of Zn–O bond distances ranging from 1.98–2.16 Å. There are ten inequivalent O sites. In the first O site, O is bonded to two Ba, three Er, and one Zn atom to form distorted OBa2Er3Zn octahedra that share corners with ten OBa4ErZn octahedra, edges with two equivalent OBa2Er3Zn octahedra, and faces with four OBa2Er4 octahedra. The corner-sharing octahedra tilt angles range from 0–76°. In the second O site, O is bonded to three Ba, one Er, one Pt, and one Zn atom to form distorted OBa3ErZnPt octahedra that share corners with eight OBa4ErZn octahedra and faces with five OBa5Zn octahedra. The corner-sharing octahedra tilt angles range from 47–58°. In the third O site, O is bonded in a 4-coordinate geometry to two Ba, three Er, and one Zn atom. In the fourth O site, O is bonded to four Ba, one Er, and one Pt atom to form distorted OBa4ErPt octahedra that share corners with eight OBa4ErZn octahedra, edges with five OBa4ErZn octahedra, and faces with two equivalent OBa3ErZnPt octahedra. The corner-sharing octahedra tilt angles range from 3–59°. In the fifth O site, O is bonded in a 6-coordinate geometry to three Ba, two Er, and one Pt atom. In the sixth O site, O is bonded to four Ba, one Er, and one Zn atom to form distorted OBa4ErZn octahedra that share corners with nine OBa4ErZn octahedra, edges with five OBa5Zn octahedra, and faces with two equivalent OBa2Er3Zn octahedra. The corner-sharing octahedra tilt angles range from 3–58°. In the seventh O site, O is bonded in a 4-coordinate geometry to two Ba, three Er, and one Zn atom. In the eighth O site, O is bonded to five Ba and one Zn atom to form distorted OBa5Zn octahedra that share corners with eight OBa5Zn octahedra, edges with eight OBa4ErZn octahedra, and faces with two equivalent OBa3ErZnPt octahedra. The corner-sharing octahedra tilt angles range from 13–55°. In the ninth O site, O is bonded to four equivalent Ba, one Er, and one Pt atom to form OBa4ErPt octahedra that share corners with nine OBa4ErPt octahedra, edges with five equivalent OBa4ErPt octahedra, and faces with two equivalent OBa3ErZnPt octahedra. The corner-sharing octahedra tilt angles range from 4–55°. In the tenth O site, O is bonded to two equivalent Ba and four equivalent Er atoms to form OBa2Er4 octahedra that share corners with ten OBa2Er4 octahedra and faces with eight equivalent OBa2Er3Zn octahedra. The corner-sharing octahedra tilt angles range from 0–60°.