Materials Data on Sm3Se4 by Materials Project
Sm3Se4 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Sm+2.67+ is bonded to eight equivalent Se2- atoms to form a mixture of distorted corner, edge, and face-sharing SmSe8 hexagonal bipyramids. There are four shorter (2.97 Å) and four longer (3.16 Å) Sm–Se bond lengths. Se2- is bonded to six equivalent Sm+2.67+ atoms to form a mixture of distorted corner, edge, and face-sharing SeSm6 octahedra. The corner-sharing octahedra tilt angles range from 18–49°.
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