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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on TbSe2 by Materials Project

TbSe2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Tb4+ is bonded in a 9-coordinate geometry to nine Se2- atoms. There are a spread of Tb–Se bond distances ranging from 2.99–3.07 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to five equivalent Tb4+ atoms to form a mixture of distorted corner and edge-sharing SeTb5 trigonal bipyramids. In the second Se2- site, Se2- is bonded in a 8-coordinate geometry to four equivalent Tb4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TbSe3 by Materials Project

TbSe2Se crystallizes in the orthorhombic Cmmm space group. The structure is two-dimensional and consists of two selenium molecules and one TbSe2 sheet oriented in the (0, 0, 1) direction. In the TbSe2 sheet, Tb4+ is bonded in a distorted rectangular see-saw-like geometry to four equivalent Se+1.33- atoms. All Tb–Se bond lengths are 2.72 Å. Se+1.33- is bonded in a linear geometry to two equivalent Tb4+ atoms.

36 MATERIALS SCIENCE↗