# New polymorph {\\gamma}-CuWO4 inspired by {\\gamma}-CuMoO4: experimental identification and theoretical verification

Source: [New polymorph {\\gamma}-CuWO4 inspired by {\\gamma}-CuMoO4: experimental identification and theoretical verification](<https://www.sota2.com/research/paper/68fa48f51e209131ce9339e0>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T07:06:33.181Z

Authors: Jiri Houska, Stanislav Haviar, Jiri Capek, Radomir Cerstvy, Kalyani Shaji, Nirmal Kumar, Petr Zeman

Published: 2025-01-06T14:23:25.000Z

## Abstract

In the context of our efforts to develop hydrogen gas sensors, two samples of ternary CuWO4 with the same crystalline structure have been prepared by two different non-equilibrium techniques. We show that the materials' structure is significantly different from the known stable one, and we identify that it is very similar to that of previously reported {\\gamma}-CuMoO4. We use ab initio calculations to confirm that the newly identified phase, {\\gamma}-CuWO4, represents a local energy minimum. We present very similar calculated and measured lattice constants and X-ray diffractograms. We make a case that the low-temperature formation of the metastable {\\gamma}-CuWO4 phase is facilitated by easier kinetics and/or by Cu-rich composition of our samples, and we show that it converts to the stable phase after annealing to 600 {\\deg}C.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2501.03036>)

[PDF](<https://arxiv.org/pdf/2501.03036.pdf>)