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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Sm(SiRh)2 by Materials Project

Sm(RhSi)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Sm2+ is bonded in a distorted body-centered cubic geometry to eight equivalent Si4- atoms. All Sm–Si bond lengths are 3.15 Å. Rh3+ is bonded to four equivalent Si4- atoms to form a mixture of edge and corner-sharing RhSi4 tetrahedra. All Rh–Si bond lengths are 2.42 Å. Si4- is bonded in a 9-coordinate geometry to four equivalent Sm2+, four equivalent Rh3+, and one Si4- atom. The Si–Si bond length is 2.49 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SmSi2Rh3 by Materials Project

SmRh3Si2 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Sm is bonded in a 6-coordinate geometry to twelve equivalent Rh and six equivalent Si atoms. All Sm–Rh bond lengths are 3.34 Å. All Sm–Si bond lengths are 3.22 Å. Rh is bonded in a distorted square co-planar geometry to four equivalent Sm and four equivalent Si atoms. All Rh–Si bond lengths are 2.45 Å. Si is bonded in a 9-coordinate geometry to three equivalent Sm and six equivalent Rh atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SmSi2Rh by Materials Project

SmRhSi2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Sm is bonded in a 6-coordinate geometry to four equivalent Rh and ten Si atoms. All Sm–Rh bond lengths are 3.23 Å. There are a spread of Sm–Si bond distances ranging from 3.17–3.22 Å. Rh is bonded in a 5-coordinate geometry to four equivalent Sm and five Si atoms. There are a spread of Rh–Si bond distances ranging from 2.35–2.42 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded in a distorted single-bond geometry to six equivalent Sm, one Rh, and two equivalent Si atoms. Both Si–Si bond lengths are 2.46 Å. In the second Si site, Si is bonded in a 4-coordinate geometry to four equivalent Sm and four equivalent Rh atoms.

36 MATERIALS SCIENCE↗