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

Curetti, Nadia; Pavese, Alessandro

doi:https://doi.org/10.5194/ejm-35-373-2023

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

Data sets

The Cambridge Structural Database C. R. Groom, I. J. Bruno, M. P. Lightfoot and S. C. Ward https://doi.org/10.1107/S2052520616003954

Model code and software

The Cambridge Structural Database C. R. Groom, I. J. Bruno, M. P. Lightfoot and S. C. Ward https://doi.org/10.1107/S2052520616003954

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).