DOE OSTI2020
Sc11Nb3O24 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twenty-two inequivalent Sc3+ sites. In the first Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.08–2.67 Å. In the second Sc3+ site, Sc3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.05–2.20 Å. In the third Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.07–2.65 Å. In the fourth Sc3+ site, Sc3+ is bonded to seven O2- atoms to form distorted ScO7 pentagonal bipyramids that share a cornercorner with one NbO6 octahedra and an edgeedge with one NbO6 octahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Sc–O bond distances ranging from 2.04–2.46 Å. In the fifth Sc3+ site, Sc3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.06–2.25 Å. In the sixth Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.08–2.66 Å. In the seventh Sc3+ site, Sc3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.07–2.23 Å. In the eighth Sc3+ site, Sc3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.06–2.21 Å. In the ninth Sc3+ site, Sc3+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing ScO6 octahedra. There are a spread of Sc–O bond distances ranging from 2.08–2.15 Å. In the tenth Sc3+ site, Sc3+ is bonded to seven O2- atoms to form a mixture of distorted corner and edge-sharing ScO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 49°. There are a spread of Sc–O bond distances ranging from 2.04–2.41 Å. In the eleventh Sc3+ site, Sc3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.07–2.20 Å. In the twelfth Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.06–2.20 Å. In the thirteenth Sc3+ site, Sc3+ is bonded to seven O2- atoms to form distorted ScO7 pentagonal bipyramids that share a cornercorner with one NbO6 octahedra and an edgeedge with one NbO6 octahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Sc–O bond distances ranging from 2.04–2.45 Å. In the fourteenth Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.10–2.69 Å. In the fifteenth Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.07–2.63 Å. In the sixteenth Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.09–2.68 Å. In the seventeenth Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.08–2.60 Å. In the eighteenth Sc3+ site, Sc3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.03–2.24 Å. In the nineteenth Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.06–2.68 Å. In the twentieth Sc3+ site, Sc3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sc–O bond distances ranging from 2.11–2.67 Å. In the twenty-first Sc3+ site, Sc3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.06–2.18 Å. In the twenty-second Sc3+ site, Sc3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sc–O bond distances ranging from 2.09–2.28 Å. There are six inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share a cornercorner with one ScO7 pentagonal bipyramid and an edgeedge with one ScO7 pentagonal bipyramid. There are a spread of Nb–O bond distances ranging from 1.96–2.08 Å. In the second Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Nb–O bond distances ranging from 1.97–2.38 Å. In the third Nb5+ site, Nb5+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.93–2.18 Å. In the fourth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share a cornercorner with one ScO7 pentagonal bipyramid and an edgeedge with one ScO7 pentagonal bipyramid. There are a spread of Nb–O bond distances ranging from 1.95–2.11 Å. In the fifth Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Nb–O bond distances ranging from 1.98–2.55 Å. In the sixth Nb5+ site, Nb5+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Nb–O bond distances ranging from 1.96–2.50 Å. There are forty-eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to four Sc3+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Sc3+ and two Nb5+ atoms. In the fourth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb tetrahedra. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Sc3+ and one Nb5+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to three Sc3+ and one Nb5+ atom. In the eighth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form distorted OSc3Nb tetrahedra that share corners with five OSc4 tetrahedra, a cornercorner with one OSc3Nb trigonal pyramid, edges with two OSc4 tetrahedra, and an edgeedge with one OSc3Nb trigonal pyramid. In the ninth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb trigonal pyramids. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to two Sc3+ and one Nb5+ atom. In the eleventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Sc3+ and two Nb5+ atoms. In the twelfth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb tetrahedra. In the thirteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Sc3+ and one Nb5+ atom. In the fourteenth O2- site, O2- is bonded to four Sc3+ atoms to form a mixture of corner and edge-sharing OSc4 tetrahedra. In the fifteenth O2- site, O2- is bonded to four Sc3+ atoms to form a mixture of corner and edge-sharing OSc4 tetrahedra. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom. In the seventeenth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form distorted OSc3Nb tetrahedra that share corners with six OSc4 tetrahedra, a cornercorner with one OSc3Nb trigonal pyramid, and edges with three OSc3Nb tetrahedra. In the eighteenth O2- site, O2- is bonded to four Sc3+ atoms to form OSc4 tetrahedra that share corners with six OSc3Nb tetrahedra, edges with two OSc4 tetrahedra, and an edgeedge with one OSc3Nb trigonal pyramid. In the nineteenth O2- site, O2- is bonded in a 4-coordinate geometry to three Sc3+ and one Nb5+ atom. In the twentieth O2- site, O2- is bonded to four Sc3+ atoms to form distorted OSc4 tetrahedra that share corners with six OSc3Nb tetrahedra and edges with three OSc4 tetrahedra. In the twenty-first O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb tetrahedra. In the twenty-second O2- site, O2- is bonded to four Sc3+ atoms to form OSc4 tetrahedra that share corners with five OSc3Nb tetrahedra, a cornercorner with one OSc3Nb trigonal pyramid, and edges with three OSc4 tetrahedra. In the twenty-third O2- site, O2- is bonded in a 3-coordinate geometry to two Sc3+ and one Nb5+ atom. In the twenty-fourth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb trigonal pyramids. In the twenty-fifth O2- site, O2- is bonded to four Sc3+ atoms to form a mixture of distorted corner and edge-sharing OSc4 tetrahedra. In the twenty-sixth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb tetrahedra. In the twenty-seventh O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form OSc3Nb tetrahedra that share corners with five OSc3Nb tetrahedra, a cornercorner with one OSc3Nb trigonal pyramid, edges with two OSc4 tetrahedra, and an edgeedge with one OSc3Nb trigonal pyramid. In the twenty-eighth O2- site, O2- is bonded to four Sc3+ atoms to form a mixture of corner and edge-sharing OSc4 tetrahedra. In the twenty-ninth O2- site, O2- is bonded to four Sc3+ atoms to form a mixture of corner and edge-sharing OSc4 tetrahedra. In the thirtieth O2- site, O2- is bonded in a 3-coordinate geometry to two Sc3+ and one Nb5+ atom. In the thirty-first O2- site, O2- is bonded to four Sc3+ atoms to form a mixture of distorted corner and edge-sharing OSc4 tetrahedra. In the thirty-second O2- site, O2- is bonded to four Sc3+ atoms to form distorted OSc4 tetrahedra that share corners with seven OSc3Nb tetrahedra and edges with three OSc4 tetrahedra. In the thirty-third O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom. In the thirty-fourth O2- site, O2- is bonded to four Sc3+ atoms to form distorted OSc4 tetrahedra that share corners with six OSc3Nb tetrahedra and edges with three OSc4 tetrahedra. In the thirty-fifth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form distorted OSc3Nb tetrahedra that share corners with four OSc4 tetrahedra, corners with two equivalent OSc3Nb trigonal pyramids, and edges with three OSc3Nb tetrahedra. In the thirty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom. In the thirty-seventh O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb tetrahedra. In the thirty-eighth O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom. In the thirty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to two Sc3+ and two Nb5+ atoms. In the fortieth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb tetrahedra. In the forty-first O2- site, O2- is bonded to four Sc3+ atoms to form a mixture of distorted corner and edge-sharing OSc4 tetrahedra. In the forty-second O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom. In the forty-third O2- site, O2- is bonded in a 3-coordinate geometry to two Sc3+ and two Nb5+ atoms. In the forty-fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Sc3+ and one Nb5+ atom. In the forty-fifth O2- site, O2- is bonded to three Sc3+ and one Nb5+ atom to form a mixture of distorted corner and edge-sharing OSc3Nb tetrahedra. In the forty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Sc3+ and one Nb5+ atom. In the forty-seventh O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom. In the forty-eighth O2- site, O2- is bonded in a 3-coordinate geometry to three Sc3+ and one Nb5+ atom.