Issue 18, 2024

Mixed anion control of negative thermal expansion in a niobium oxyfluoride

Abstract

A significant change in thermal expansion with anion composition has been identified in the niobium oxyfluoride, NbO2−xF1+x from 0 < x < 0.6. Fluorine doping leads to a transition from positive thermal expansion to unusual zero and negative thermal expansion caused by transverse anionic vibrations. This work has consequences for the development of advanced technological materials with tuneable low thermal expansion and is the first example of the use of multiple anions to control thermal expansion.

Graphical abstract: Mixed anion control of negative thermal expansion in a niobium oxyfluoride

Supplementary files

Article information

Article type
Communication
Submitted
15 dic. 2023
Accepted
01 feb. 2024
First published
01 feb. 2024
This article is Open Access
Creative Commons BY license

Chem. Commun., 2024,60, 2548-2551

Mixed anion control of negative thermal expansion in a niobium oxyfluoride

E. K. Dempsey and J. Cumby, Chem. Commun., 2024, 60, 2548 DOI: 10.1039/D3CC06129A

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