European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 35, issue 3
Articles | Volume 35, issue 3
https://doi.org/10.5194/ejm-35-373-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-35-373-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 35, issue 3
Research article
 | 
01 Jun 2023
Research article |  | 01 Jun 2023

Fe-bearing vanadium dioxide–paramontroseite: structural details and high-temperature transformation

Nadia Curetti and Alessandro Pavese

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Short summary
Paramontroseite is a V dioxide (a = 4.8960(14) Å, b = 9.395(3) Å, c = 2.9163(5) Å, V = 134.14(6) Å3; space group Pbnm). The sample under investigation (Prachovice mine, Czech Republic) bears 20 wt % of Fe2O3, and the Fe atoms occupy tetrahedral sites arranged in the empty channel along z. Thermal expansion is anisotropic. At T > 350 °C, paramontroseite decomposes and two new phases form: V2O5 (V-pentoxide) and V4Fe2O13 (Fe-tetrapolyvanadate).
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