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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on SrEuO2 by Materials Project

SrEuO2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Sr2+ is bonded to six equivalent O2- atoms to form SrO6 octahedra that share corners with six equivalent EuO6 octahedra, edges with six equivalent SrO6 octahedra, and edges with six equivalent EuO6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Sr–O bond lengths are 2.60 Å. Eu2+ is bonded to six equivalent O2- atoms to form EuO6 octahedra that share corners with six equivalent SrO6 octahedra, edges with six equivalent SrO6 octahedra, and edges with six equivalent EuO6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Eu–O bond lengths are 2.55 Å. O2- is bonded to three equivalent Sr2+ and three equivalent Eu2+ atoms to form a mixture of edge and corner-sharing OSr3Eu3 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrEu4O5 by Materials Project

SrEu4O5 is Caswellsilverite-like structured and crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with four equivalent EuO6 octahedra, and edges with twelve equivalent EuO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.56 Å) and four longer (2.60 Å) Sr–O bond lengths. Eu2+ is bonded to six O2- atoms to form EuO6 octahedra that share a cornercorner with one SrO6 octahedra, corners with five equivalent EuO6 octahedra, edges with three equivalent SrO6 octahedra, and edges with nine equivalent EuO6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Eu–O bond distances ranging from 2.51–2.56 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sr2+ and four equivalent Eu2+ atoms to form OSr2Eu4 octahedra that share corners with six OSr2Eu4 octahedra and edges with twelve OSrEu5 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the second O2- site, O2- is bonded to one Sr2+ and five equivalent Eu2+ atoms to form a mixture of edge and corner-sharing OSrEu5 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the third O2- site, O2- is bonded to one Sr2+ and five equivalent Eu2+ atoms to form a mixture of edge and corner-sharing OSrEu5 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the fourth O2- site, O2- is bonded to one Sr2+ and five equivalent Eu2+ atoms to form a mixture of edge and corner-sharing OSrEu5 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of O–Eu bond distances ranging from 2.51–2.56 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrEuO3 by Materials Project

SrEuO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sr is bonded to twelve equivalent O atoms to form SrO12 cuboctahedra that share corners with twelve equivalent SrO12 cuboctahedra, faces with six equivalent SrO12 cuboctahedra, and faces with eight equivalent EuO6 octahedra. All Sr–O bond lengths are 3.10 Å. Eu is bonded to six equivalent O atoms to form EuO6 octahedra that share corners with six equivalent EuO6 octahedra and faces with eight equivalent SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Eu–O bond lengths are 2.19 Å. O is bonded in a distorted linear geometry to four equivalent Sr and two equivalent Eu atoms.

36 MATERIALS SCIENCE↗