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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NbFe(PbO3)2 by Materials Project

NbFe(PbO3)2 is (Cubic) Perovskite-derived structured and crystallizes in the tetragonal I4mm space group. The structure is three-dimensional. Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six equivalent FeO6 octahedra and faces with eight equivalent PbO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Nb–O bond distances ranging from 2.00–2.03 Å. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six equivalent NbO6 octahedra and faces with eight equivalent PbO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Fe–O bond distances ranging from 2.01–2.06 Å. Pb2+ is bonded to twelve O2- atoms to form PbO12 cuboctahedra that share corners with twelve equivalent PbO12 cuboctahedra, faces with six equivalent PbO12 cuboctahedra, faces with four equivalent NbO6 octahedra, and faces with four equivalent FeO6 octahedra. There are a spread of Pb–O bond distances ranging from 2.84–2.89 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to one Nb5+, one Fe3+, and four equivalent Pb2+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to one Nb5+, one Fe3+, and four equivalent Pb2+ atoms. In the third O2- site, O2- is bonded in a linear geometry to one Nb5+, one Fe3+, and four equivalent Pb2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NbFe(PbO3)2 by Materials Project

NbFe(PbO3)2 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Pmm2 space group. The structure is three-dimensional. Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent FeO6 octahedra, corners with four equivalent NbO6 octahedra, and faces with eight PbO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Nb–O bond distances ranging from 1.99–2.03 Å. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with two equivalent NbO6 octahedra, corners with four equivalent FeO6 octahedra, and faces with eight PbO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Fe–O bond distances ranging from 2.03–2.07 Å. There are two inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded to twelve O2- atoms to form PbO12 cuboctahedra that share corners with twelve PbO12 cuboctahedra, faces with six PbO12 cuboctahedra, faces with four equivalent NbO6 octahedra, and faces with four equivalent FeO6 octahedra. There are a spread of Pb–O bond distances ranging from 2.70–3.04 Å. In the second Pb2+ site, Pb2+ is bonded to twelve O2- atoms to form distorted PbO12 cuboctahedra that share corners with twelve PbO12 cuboctahedra, faces with six PbO12 cuboctahedra, faces with four equivalent NbO6 octahedra, and faces with four equivalent FeO6 octahedra. There are a spread of Pb–O bond distances ranging from 2.66–3.09 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to two equivalent Nb5+ and four Pb2+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to two equivalent Fe3+ and four Pb2+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two equivalent Nb5+ and four Pb2+ atoms. In the fourth O2- site, O2- is bonded in a distorted linear geometry to two equivalent Fe3+ and four Pb2+ atoms. In the fifth O2- site, O2- is bonded in a linear geometry to one Nb5+, one Fe3+, and four equivalent Pb2+ atoms. In the sixth O2- site, O2- is bonded in a distorted linear geometry to one Nb5+, one Fe3+, and four equivalent Pb2+ atoms.

36 MATERIALS SCIENCE↗