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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on EuNbO3 by Materials Project

EuNbO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Eu2+ is bonded to twelve equivalent O2- atoms to form EuO12 cuboctahedra that share corners with twelve equivalent EuO12 cuboctahedra, faces with six equivalent EuO12 cuboctahedra, and faces with eight equivalent NbO6 octahedra. All Eu–O bond lengths are 2.89 Å. Nb4+ is bonded to six equivalent O2- atoms to form NbO6 octahedra that share corners with six equivalent NbO6 octahedra and faces with eight equivalent EuO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Nb–O bond lengths are 2.04 Å. O2- is bonded in a distorted linear geometry to four equivalent Eu2+ and two equivalent Nb4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuNbO3 by Materials Project

EuNbO3 is Orthorhombic Perovskite-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Eu2+ is bonded in a 12-coordinate geometry to five O2- atoms. There are one shorter (2.54 Å) and four longer (2.63 Å) Eu–O bond lengths. Nb4+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 17–23°. All Nb–O bond lengths are 2.06 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to one Eu2+ and two equivalent Nb4+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Eu2+ and two equivalent Nb4+ atoms.

36 MATERIALS SCIENCE↗