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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on LaGeOs by Materials Project

LaOsGe is half-Heusler structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. La is bonded in a body-centered cubic geometry to four equivalent Os and four equivalent Ge atoms. All La–Os bond lengths are 2.92 Å. All La–Ge bond lengths are 2.92 Å. Os is bonded to four equivalent La atoms to form OsLa4 tetrahedra that share corners with four equivalent GeLa4 tetrahedra, corners with twelve equivalent OsLa4 tetrahedra, and edges with six equivalent GeLa4 tetrahedra. Ge is bonded to four equivalent La atoms to form GeLa4 tetrahedra that share corners with four equivalent OsLa4 tetrahedra, corners with twelve equivalent GeLa4 tetrahedra, and edges with six equivalent OsLa4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LaGe3Os by Materials Project

LaOsGe3 crystallizes in the tetragonal I4mm space group. The structure is three-dimensional. La is bonded in a 12-coordinate geometry to five equivalent Os and twelve Ge atoms. There are one shorter (3.49 Å) and four longer (3.54 Å) La–Os bond lengths. There are a spread of La–Ge bond distances ranging from 3.26–3.47 Å. Os is bonded in a 5-coordinate geometry to five equivalent La and five Ge atoms. There are one shorter (2.39 Å) and four longer (2.47 Å) Os–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 1-coordinate geometry to four equivalent La, one Os, and four equivalent Ge atoms. All Ge–Ge bond lengths are 2.79 Å. In the second Ge site, Ge is bonded in a 2-coordinate geometry to four equivalent La, two equivalent Os, and two equivalent Ge atoms.

36 MATERIALS SCIENCE↗