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DOE OSTI · 1199406

Materials Data on Nb2Se3 by Materials Project

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Abstract

Nb2Se3 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are two inequivalent Nb3+ sites. In the first Nb3+ site, Nb3+ is bonded to six Se2- atoms to form a mixture of corner, edge, and face-sharing NbSe6 octahedra. There are a spread of Nb–Se bond distances ranging from 2.53–2.77 Å. In the second Nb3+ site, Nb3+ is bonded to six Se2- atoms to form a mixture of distorted corner, edge, and face-sharing NbSe6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 49–58°. There are a spread of Nb–Se bond distances ranging from 2.58–3.00 Å. There are three inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 3-coordinate geometry to three equivalent Nb3+ atoms. In the second Se2- site, Se2- is bonded in a 5-coordinate geometry to five Nb3+ atoms. In the third Se2- site, Se2- is bonded in a 4-coordinate geometry to four Nb3+ atoms.

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36 MATERIALS SCIENCEcrystal structureNb-SeNb2Se3

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2020-07-16. Materials Data on Nb2Se3 by Materials Project. https://doi.org/10.17188/1199406

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