Materials Data on Sm3Sn13Rh4 by Materials Project
Sm3Rh4Sn13 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Sm is bonded in a 12-coordinate geometry to four equivalent Rh and twelve equivalent Sn atoms. All Sm–Rh bond lengths are 3.46 Å. There are eight shorter (3.43 Å) and four longer (3.45 Å) Sm–Sn bond lengths. Rh is bonded in a 6-coordinate geometry to three equivalent Sm and six equivalent Sn atoms. All Rh–Sn bond lengths are 2.69 Å. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a cuboctahedral geometry to twelve equivalent Sn atoms. All Sn–Sn bond lengths are 3.37 Å. In the second Sn site, Sn is bonded in a 2-coordinate geometry to three equivalent Sm, two equivalent Rh, and one Sn atom.
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