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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on EuGaAu2 by Materials Project

EuAu2Ga is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Eu is bonded in a body-centered cubic geometry to eight equivalent Au atoms. All Eu–Au bond lengths are 3.07 Å. Au is bonded in a body-centered cubic geometry to four equivalent Eu and four equivalent Ga atoms. All Au–Ga bond lengths are 3.07 Å. Ga is bonded in a distorted body-centered cubic geometry to eight equivalent Au atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuGa4Au3 by Materials Project

EuAu3Ga4 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Eu is bonded in a 8-coordinate geometry to eight equivalent Au and eight equivalent Ga atoms. All Eu–Au bond lengths are 3.41 Å. All Eu–Ga bond lengths are 3.59 Å. There are two inequivalent Au sites. In the first Au site, Au is bonded in a 9-coordinate geometry to four equivalent Eu, one Au, and four equivalent Ga atoms. The Au–Au bond length is 2.75 Å. All Au–Ga bond lengths are 2.64 Å. In the second Au site, Au is bonded in a body-centered cubic geometry to eight equivalent Ga atoms. All Au–Ga bond lengths are 2.68 Å. Ga is bonded to two equivalent Eu and four Au atoms to form a mixture of edge, face, and corner-sharing GaEu2Au4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuGaAu by Materials Project

EuAuGa crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to six equivalent Au and six equivalent Ga atoms. There are a spread of Eu–Au bond distances ranging from 3.14–3.45 Å. There are a spread of Eu–Ga bond distances ranging from 3.27–3.42 Å. Au is bonded in a 2-coordinate geometry to six equivalent Eu, one Au, and three equivalent Ga atoms. The Au–Au bond length is 2.96 Å. There are two shorter (2.66 Å) and one longer (3.01 Å) Au–Ga bond lengths. Ga is bonded in a 10-coordinate geometry to six equivalent Eu, three equivalent Au, and one Ga atom. The Ga–Ga bond length is 2.70 Å.

36 MATERIALS SCIENCE↗