Materials Data on YbSmSe3 by Materials Project
SmYbSe3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Yb3+ is bonded to six Se2- atoms to form a mixture of edge and corner-sharing YbSe6 octahedra. The corner-sharing octahedral tilt angles are 70°. There are two shorter (2.82 Å) and four longer (2.98 Å) Yb–Se bond lengths. Sm3+ is bonded in a 8-coordinate geometry to eight Se2- atoms. There are a spread of Sm–Se bond distances ranging from 2.87–3.40 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to two equivalent Yb3+ and two equivalent Sm3+ atoms to form corner-sharing SeYb2Sm2 tetrahedra. In the second Se2- site, Se2- is bonded in a 5-coordinate geometry to two equivalent Yb3+ and three equivalent Sm3+ atoms.
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