DOI: 10.17188/1715511
title: Materials Data on Sr7Nb34O52 by Materials Project

description: Sr7Nb34O52 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are seven inequivalent Sr sites. In the first Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with five SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with two SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.78–3.15 Å. In the second Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with five SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with three SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.82–3.08 Å. In the third Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with three SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with four SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.85–2.96 Å. In the fourth Sr site, Sr is bonded to twelve O atoms to form distorted SrO12 cuboctahedra that share corners with five SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with three SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.72–3.14 Å. In the fifth Sr site, Sr is bonded to twelve O atoms to form distorted SrO12 cuboctahedra that share corners with three SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with four SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.73–3.13 Å. In the sixth Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with five SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with four SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.79–3.07 Å. In the seventh Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with four SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with four SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.79–3.08 Å. There are twenty-one inequivalent Nb sites. In the first Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share corners with two SrO12 cuboctahedra, corners with five NbO5 square pyramids, an edgeedge with one NbO5 square pyramid, and a faceface with one SrO12 cuboctahedra. There are a spread of Nb–O bond distances ranging from 2.07–2.16 Å. In the second Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.08–2.17 Å. In the third Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.09–2.18 Å. In the fourth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.10–2.15 Å. In the fifth Nb site, Nb is bonded in a square co-planar geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.10–2.16 Å. In the sixth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one NbO6 octahedra, corners with five NbO5 square pyramids, and faces with three SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 7°. There are a spread of Nb–O bond distances ranging from 2.03–2.15 Å. In the seventh Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.08–2.19 Å. In the eighth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.08–2.18 Å. In the ninth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one NbO6 octahedra, corners with five NbO5 square pyramids, and faces with three SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 14°. There are a spread of Nb–O bond distances ranging from 2.07–2.17 Å. In the tenth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share corners with two SrO12 cuboctahedra, corners with five NbO5 square pyramids, an edgeedge with one NbO5 square pyramid, and faces with two SrO12 cuboctahedra. There are a spread of Nb–O bond distances ranging from 2.10–2.17 Å. In the eleventh Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra, corners with four NbO5 square pyramids, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 4–7°. There are a spread of Nb–O bond distances ranging from 1.97–2.11 Å. In the twelfth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share corners with two SrO12 cuboctahedra, corners with five NbO5 square pyramids, an edgeedge with one NbO5 square pyramid, and faces with two SrO12 cuboctahedra. There are a spread of Nb–O bond distances ranging from 2.10–2.17 Å. In the thirteenth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one NbO6 octahedra, corners with five NbO5 square pyramids, and faces with four SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 6°. There are a spread of Nb–O bond distances ranging from 2.06–2.14 Å. In the fourteenth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.09–2.17 Å. In the fifteenth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.08–2.16 Å. In the sixteenth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one NbO6 octahedra, corners with five NbO5 square pyramids, and faces with four SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 9°. There are a spread of Nb–O bond distances ranging from 2.05–2.15 Å. In the seventeenth Nb site, Nb is bonded in a square co-planar geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.09–2.15 Å. In the eighteenth Nb site, Nb is bonded in a square co-planar geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.10–2.15 Å. In the nineteenth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.07–2.17 Å. In the twentieth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.06–2.17 Å. In the twenty-first Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one SrO12 cuboctahedra, corners with five NbO5 square pyramids, an edgeedge with one NbO5 square pyramid, and faces with two SrO12 cuboctahedra. There are a spread of Nb–O bond distances ranging from 2.10–2.16 Å. There are thirty-nine inequivalent O sites. In the first O site, O is bonded in a rectangular see-saw-like geometry to four Nb atoms. In the second O site, O is bonded in a rectangular see-saw-like geometry to four Nb atoms. In the third O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the fourth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the fifth O site, O is bonded in a square co-planar geometry to four Nb atoms. In the sixth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the seventh O site, O is bonded in a T-shaped geometry to three Nb atoms. In the eighth O site, O is bonded in a rectangular see-saw-like geometry to four Nb atoms. In the ninth O site, O is bonded in a rectangular see-saw-like geometry to four Nb atoms. In the tenth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the eleventh O site, O is bonded in a square co-planar geometry to four Nb atoms. In the twelfth O site, O is bonded in a square co-planar geometry to four Nb atoms. In the thirteenth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the fourteenth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the fifteenth O site, O is bonded to two Sr and three Nb atoms to form a mixture of distorted corner and edge-sharing OSr2Nb3 trigonal bipyramids. In the sixteenth O site, O is bonded to two Sr and three Nb atoms to form distorted OSr2Nb3 trigonal bipyramids that share a cornercorner with one OSr3Nb2 square pyramid, corners with five OSr2Nb3 trigonal bipyramids, and an edgeedge with one OSr2Nb3 trigonal bipyramid. In the seventeenth O site, O is bonded in a distorted see-saw-like geometry to one Sr and three Nb atoms. In the eighteenth O site, O is bonded to two Sr and three Nb atoms to form a mixture of distorted corner and edge-sharing OSr2Nb3 trigonal bipyramids. In the nineteenth O site, O is bonded in a distorted linear geometry to three Sr and two Nb atoms. In the twentieth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the twenty-first O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the twenty-second O site, O is bonded in a 2-coordinate geometry to three Sr and two Nb atoms. In the twenty-third O site, O is bonded to two Sr and three Nb atoms to form distorted OSr2Nb3 trigonal bipyramids that share a cornercorner with one OSr3Nb2 square pyramid, corners with seven OSr2Nb3 trigonal bipyramids, an edgeedge with one OSr2Nb3 trigonal bipyramid, and a faceface with one OSr2Nb3 trigonal bipyramid. In the twenty-fourth O site, O is bonded to three Sr and two equivalent Nb atoms to form a mixture of distorted corner and edge-sharing OSr3Nb2 square pyramids. In the twenty-fifth O site, O is bonded in a distorted linear geometry to four Sr and two equivalent Nb atoms. In the twenty-sixth O site, O is bonded in a distorted T-shaped geometry to two Sr and three Nb atoms. In the twenty-seventh O site, O is bonded in a distorted linear geometry to four Sr and two Nb atoms. In the twenty-eighth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the twenty-ninth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the thirtieth O site, O is bonded in a 2-coordinate geometry to four Sr and two Nb atoms. In the thirty-first O site, O is bonded to two Sr and three Nb atoms to form a mixture of distorted corner and edge-sharing OSr2Nb3 trigonal bipyramids. In the thirty-second O site, O is bonded to two Sr and three Nb atoms to form distorted OSr2Nb3 trigonal bipyramids that share corners with five OSr2Nb3 trigonal bipyramids, an edgeedge with one OSr3Nb2 square pyramid, and edges with two equivalent OSr2Nb3 trigonal bipyramids. In the thirty-third O site, O is bonded to two Sr and three Nb atoms to form distorted OSr2Nb3 trigonal bipyramids that share a cornercorner with one OSr3Nb2 square pyramid, corners with five OSr2Nb3 trigonal bipyramids, edges with two OSr2Nb3 trigonal b