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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Tb(FeGe)2 by Materials Project

TbFe2Ge2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tb is bonded in a 8-coordinate geometry to eight equivalent Fe and eight equivalent Ge atoms. All Tb–Fe bond lengths are 3.33 Å. All Tb–Ge bond lengths are 3.07 Å. Fe is bonded to four equivalent Tb and four equivalent Ge atoms to form a mixture of distorted corner, edge, and face-sharing FeTb4Ge4 tetrahedra. All Fe–Ge bond lengths are 2.43 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Tb, four equivalent Fe, and one Ge atom. The Ge–Ge bond length is 2.53 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TbFeGe2 by Materials Project

TbFeGe2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Tb is bonded in a 8-coordinate geometry to four equivalent Fe and ten Ge atoms. All Tb–Fe bond lengths are 3.25 Å. There are a spread of Tb–Ge bond distances ranging from 3.10–3.22 Å. Fe is bonded in a 5-coordinate geometry to four equivalent Tb and five Ge atoms. There are a spread of Fe–Ge bond distances ranging from 2.29–2.38 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 1-coordinate geometry to six equivalent Tb, one Fe, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.59 Å. In the second Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent Tb and four equivalent Fe atoms.

36 MATERIALS SCIENCE↗