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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on EuSe by Materials Project

EuSe is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Eu2+ is bonded to six equivalent Se2- atoms to form a mixture of edge and corner-sharing EuSe6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Eu–Se bond lengths are 3.07 Å. Se2- is bonded to six equivalent Eu2+ atoms to form a mixture of edge and corner-sharing SeEu6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuSe by Materials Project

EuSe is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Eu2+ is bonded in a body-centered cubic geometry to eight equivalent Se2- atoms. All Eu–Se bond lengths are 3.27 Å. Se2- is bonded in a body-centered cubic geometry to eight equivalent Eu2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu2Se3 by Materials Project

Eu2Se3 crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. there are two inequivalent Eu3+ sites. In the first Eu3+ site, Eu3+ is bonded to six Se2- atoms to form a mixture of corner and edge-sharing EuSe6 octahedra. The corner-sharing octahedral tilt angles are 7°. There are a spread of Eu–Se bond distances ranging from 2.92–2.97 Å. In the second Eu3+ site, Eu3+ is bonded to six Se2- atoms to form a mixture of corner and edge-sharing EuSe6 octahedra. The corner-sharing octahedra tilt angles range from 6–7°. There are a spread of Eu–Se bond distances ranging from 2.95–3.02 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a rectangular see-saw-like geometry to four Eu3+ atoms. In the second Se2- site, Se2- is bonded in a rectangular see-saw-like geometry to four Eu3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuSe2 by Materials Project

EuSe2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Eu3+ is bonded in a 9-coordinate geometry to nine Se+1.50- atoms. There are a spread of Eu–Se bond distances ranging from 2.99–3.27 Å. There are two inequivalent Se+1.50- sites. In the first Se+1.50- site, Se+1.50- is bonded in a 8-coordinate geometry to four equivalent Eu3+ and four equivalent Se+1.50- atoms. All Se–Se bond lengths are 2.90 Å. In the second Se+1.50- site, Se+1.50- is bonded to five equivalent Eu3+ atoms to form a mixture of distorted edge and corner-sharing SeEu5 trigonal bipyramids.

36 MATERIALS SCIENCE↗