Materials Data on SmNiGe2 by Materials Project
SmNiGe2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Sm is bonded in a 4-coordinate geometry to four equivalent Ni and ten Ge atoms. All Sm–Ni bond lengths are 3.22 Å. There are a spread of Sm–Ge bond distances ranging from 3.16–3.26 Å. Ni is bonded in a 5-coordinate geometry to four equivalent Sm and five Ge atoms. There are one shorter (2.32 Å) and four longer (2.40 Å) Ni–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 1-coordinate geometry to six equivalent Sm, one Ni, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.54 Å. In the second Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent Sm and four equivalent Ni atoms.
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