Materials Data on Sm3Ni by Materials Project
Sm3Ni is Cementite structured and crystallizes in the orthorhombic Pnma space group. The structure is two-dimensional and consists of two Sm3Ni sheets oriented in the (0, 0, 1) direction. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded in a distorted L-shaped geometry to two equivalent Ni atoms. There are one shorter (2.79 Å) and one longer (2.86 Å) Sm–Ni bond lengths. In the second Sm site, Sm is bonded in a distorted bent 150 degrees geometry to two equivalent Ni atoms. There are one shorter (2.79 Å) and one longer (2.90 Å) Sm–Ni bond lengths. Ni is bonded in a 6-coordinate geometry to six Sm atoms.
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