Materials Data on SmEuSe2 by Materials Project
EuSmSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Eu2+ is bonded to six equivalent Se2- atoms to form EuSe6 octahedra that share corners with six equivalent SmSe6 octahedra, edges with six equivalent EuSe6 octahedra, and edges with six equivalent SmSe6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Eu–Se bond lengths are 3.02 Å. Sm2+ is bonded to six equivalent Se2- atoms to form SmSe6 octahedra that share corners with six equivalent EuSe6 octahedra, edges with six equivalent EuSe6 octahedra, and edges with six equivalent SmSe6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Sm–Se bond lengths are 2.96 Å. Se2- is bonded to three equivalent Eu2+ and three equivalent Sm2+ atoms to form a mixture of edge and corner-sharing SeSm3Eu3 octahedra. The corner-sharing octahedral tilt angles are 0°.