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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on EuAl2 by Materials Project

EuAl2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to four equivalent Eu and twelve equivalent Al atoms. All Eu–Eu bond lengths are 3.54 Å. All Eu–Al bond lengths are 3.39 Å. Al is bonded to six equivalent Eu and six equivalent Al atoms to form a mixture of edge, face, and corner-sharing AlEu6Al6 cuboctahedra. All Al–Al bond lengths are 2.89 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuAl4 by Materials Project

EuAl4 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Eu is bonded in a 8-coordinate geometry to sixteen Al atoms. There are eight shorter (3.35 Å) and eight longer (3.57 Å) Eu–Al bond lengths. There are two inequivalent Al sites. In the first Al site, Al is bonded to four equivalent Eu and eight Al atoms to form a mixture of distorted edge, face, and corner-sharing AlEu4Al8 cuboctahedra. There are four shorter (2.67 Å) and four longer (3.09 Å) Al–Al bond lengths. In the second Al site, Al is bonded in a 9-coordinate geometry to four equivalent Eu and five Al atoms. The Al–Al bond length is 2.57 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuAl by Materials Project

EuAl is delta Molybdenum Boride-like structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Eu is bonded in a 7-coordinate geometry to seven equivalent Al atoms. There are a spread of Eu–Al bond distances ranging from 3.33–3.64 Å. Al is bonded in a 9-coordinate geometry to seven equivalent Eu and two equivalent Al atoms. Both Al–Al bond lengths are 2.79 Å.

36 MATERIALS SCIENCE↗