Materials Data on TmMnSi2 by Materials Project
TmMnSi2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Tm is bonded in a 10-coordinate geometry to ten Si atoms. There are a spread of Tm–Si bond distances ranging from 3.04–3.13 Å. Mn is bonded in a 5-coordinate geometry to five Si atoms. There are a spread of Mn–Si bond distances ranging from 2.28–2.31 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded in a distorted single-bond geometry to six equivalent Tm, one Mn, and two equivalent Si atoms. Both Si–Si bond lengths are 2.49 Å. In the second Si site, Si is bonded in a 4-coordinate geometry to four equivalent Tm and four equivalent Mn atoms.
36 MATERIALS SCIENCE↗