Materials Data on SmCuSi by Materials Project
SmCuSi crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Sm3+ is bonded to six equivalent Si4- atoms to form a mixture of face, edge, and corner-sharing SmSi6 octahedra. The corner-sharing octahedral tilt angles are 46°. All Sm–Si bond lengths are 3.10 Å. Cu1+ is bonded in a trigonal planar geometry to three equivalent Si4- atoms. All Cu–Si bond lengths are 2.42 Å. Si4- is bonded in a 9-coordinate geometry to six equivalent Sm3+ and three equivalent Cu1+ atoms.