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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on SmRh3C by Materials Project

SmRh3C is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sm is bonded to twelve equivalent Rh atoms to form SmRh12 cuboctahedra that share corners with twelve equivalent SmRh12 cuboctahedra, faces with six equivalent SmRh12 cuboctahedra, and faces with eight equivalent CRh6 octahedra. All Sm–Rh bond lengths are 2.98 Å. Rh is bonded to four equivalent Sm and two equivalent C atoms to form a mixture of distorted corner, edge, and face-sharing RhSm4C2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°. Both Rh–C bond lengths are 2.11 Å. C is bonded to six equivalent Rh atoms to form CRh6 octahedra that share corners with six equivalent CRh6 octahedra and faces with eight equivalent SmRh12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SmRhC2 by Materials Project

SmRhC2 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Sm3+ is bonded in a 8-coordinate geometry to eight equivalent C3- atoms. There are four shorter (2.77 Å) and four longer (2.84 Å) Sm–C bond lengths. Rh3+ is bonded in a 4-coordinate geometry to four equivalent C3- atoms. There are two shorter (2.10 Å) and two longer (2.16 Å) Rh–C bond lengths. C3- is bonded in a 7-coordinate geometry to four equivalent Sm3+, two equivalent Rh3+, and one C3- atom. The C–C bond length is 1.35 Å.

36 MATERIALS SCIENCE↗