Materials Data on Tb2Se2O7 by Materials Project
Tb2Se2O7 is Zircon-like structured and crystallizes in the tetragonal P4_2/ncm space group. The structure is three-dimensional. Tb3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Tb–O bond distances ranging from 2.27–2.54 Å. Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. All Se–O bond lengths are 1.74 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Tb3+ atoms to form edge-sharing OTb4 tetrahedra. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Tb3+ and one Se4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Tb3+ and one Se4+ atom.
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