Materials Data on TbFeSi2 by Materials Project
TbFeSi2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Tb is bonded in a 4-coordinate geometry to four equivalent Fe and ten Si atoms. There are two shorter (3.09 Å) and two longer (3.10 Å) Tb–Fe bond lengths. There are a spread of Tb–Si bond distances ranging from 3.04–3.13 Å. Fe is bonded in a 4-coordinate geometry to four equivalent Tb and four equivalent Si atoms. There are two shorter (2.24 Å) and two longer (2.27 Å) Fe–Si bond lengths. There are two inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to six equivalent Tb and three Si atoms. There are two shorter (2.35 Å) and one longer (2.45 Å) Si–Si bond lengths. In the second Si site, Si is bonded in a 9-coordinate geometry to four equivalent Tb, four equivalent Fe, and one Si atom.