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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Sm(GeRh)2 by Materials Project

Sm(RhGe)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Sm is bonded in a 8-coordinate geometry to eight equivalent Rh and eight equivalent Ge atoms. All Sm–Rh bond lengths are 3.35 Å. All Sm–Ge bond lengths are 3.22 Å. Rh is bonded to four equivalent Sm and four equivalent Ge atoms to form a mixture of distorted corner, edge, and face-sharing RhSm4Ge4 tetrahedra. All Rh–Ge bond lengths are 2.47 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Sm, four equivalent Rh, and one Ge atom. The Ge–Ge bond length is 2.58 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm3(GeRh)2 by Materials Project

Sm3Rh2Ge2 crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded in a 7-coordinate geometry to four equivalent Rh and five Ge atoms. There are a spread of Sm–Rh bond distances ranging from 2.94–3.20 Å. There are a spread of Sm–Ge bond distances ranging from 3.04–3.38 Å. In the second Sm site, Sm is bonded in a 9-coordinate geometry to four equivalent Rh and five Ge atoms. There are two shorter (3.07 Å) and two longer (3.16 Å) Sm–Rh bond lengths. There are a spread of Sm–Ge bond distances ranging from 3.03–3.35 Å. Rh is bonded in a 9-coordinate geometry to six Sm and three Ge atoms. There are one shorter (2.56 Å) and two longer (2.61 Å) Rh–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to seven Sm and two equivalent Rh atoms. In the second Ge site, Ge is bonded to eight Sm and four equivalent Rh atoms to form a mixture of distorted corner, edge, and face-sharing GeSm8Rh4 cuboctahedra.

36 MATERIALS SCIENCE↗