Materials Data on Tb3Fe2Si7 by Materials Project
Tb3Fe2Si7 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are three inequivalent Tb sites. In the first Tb site, Tb is bonded in a 10-coordinate geometry to four equivalent Fe and ten Si atoms. All Tb–Fe bond lengths are 3.21 Å. There are a spread of Tb–Si bond distances ranging from 3.01–3.11 Å. In the second Tb site, Tb is bonded in a 10-coordinate geometry to four equivalent Fe and ten Si atoms. All Tb–Fe bond lengths are 3.20 Å. There are a spread of Tb–Si bond distances ranging from 3.01–3.11 Å. In the third Tb site, Tb is bonded in a 12-coordinate geometry to two Fe and twelve Si atoms. Both Tb–Fe bond lengths are 3.09 Å. There are a spread of Tb–Si bond distances ranging from 2.88–2.98 Å. There are two inequivalent Fe sites. In the first Fe site, Fe is bonded in a 5-coordinate geometry to five Tb and five Si atoms. There are a spread of Fe–Si bond distances ranging from 2.23–2.29 Å. In the second Fe site, Fe is bonded in a 5-coordinate geometry to five Tb and five Si atoms. There are a spread of Fe–Si bond distances ranging from 2.24–2.30 Å. There are seven inequivalent Si sites. In the first Si site, Si is bonded in a 12-coordinate geometry to four Tb and two equivalent Fe atoms. In the second Si site, Si is bonded in a 9-coordinate geometry to six Tb, one Fe, and two equivalent Si atoms. Both Si–Si bond lengths are 2.48 Å. In the third Si site, Si is bonded in a 12-coordinate geometry to four Tb and two equivalent Fe atoms. In the fourth Si site, Si is bonded in a 9-coordinate geometry to six Tb, one Fe, and two equivalent Si atoms. In the fifth Si site, Si is bonded in a 2-coordinate geometry to four Tb and two equivalent Fe atoms. In the sixth Si site, Si is bonded in a distorted rectangular see-saw-like geometry to four equivalent Tb atoms. In the seventh Si site, Si is bonded in a 2-coordinate geometry to four Tb and two equivalent Fe atoms.