Materials Data on TmCuSi by Materials Project
TmCuSi crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Tm3+ is bonded to six equivalent Si4- atoms to form a mixture of edge, face, and corner-sharing TmSi6 octahedra. The corner-sharing octahedral tilt angles are 47°. All Tm–Si bond lengths are 3.00 Å. Cu1+ is bonded in a trigonal planar geometry to three equivalent Si4- atoms. All Cu–Si bond lengths are 2.38 Å. Si4- is bonded in a 9-coordinate geometry to six equivalent Tm3+ and three equivalent Cu1+ atoms.
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