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Thermal expansion of FeWO4 (Ferberite) and FeWO4:Fe2WO6 (7:1): a comparative X-ray and neutron diffraction study

  • O. Fabelo
  • L. Cañadillas-Delgado
  • D. Vie
  • E. Matesanz
  • J. Gonzalez-Platas
  • D. Errandonea
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Abstract

The thermal expansion of natural FeWO4 (ferberite) and synthetic FeWO4:Fe2WO6 (7:1) was investigated over the 2-1123 K temperature range combining single-crystal and powder X-ray diffraction together with neutron powder diffraction. High-precision lattice parameters were obtained for both samples. The temperature dependence of the unit-cell volume was analysed using physically based thermodynamic models, including the Kroll and Berman approaches as implemented in EoSFit7. All datasets are well reproduced within their respective temperature intervals. However, significant differences are observed between the behavior of ferberite and FeWO4:Fe2WO6, which has a \~40% smaller thermal expansion coefficient and a reduced reference volume. Possible origins, including microstructural and phase-coexistence effects, are discussed. The results provide a comprehensive description of the thermal expansion behavior of FeWO4 across a wide temperature range.

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Cite

BibTeXRIS
BibTeX
@misc{fabelo2026thermal,
  title = {{Thermal expansion of FeWO$_4$ (Ferberite) and FeWO$_4$:Fe$_2$WO$_6$ (7:1): a comparative X-ray and neutron diffraction study}},
  author = {O. Fabelo and L. Cañadillas-Delgado and D. Vie and E. Matesanz and J. Gonzalez-Platas and D. Errandonea},
  howpublished = {arXiv},
  year = {2026},
  month = may,
  doi = {10.48550/arxiv.2605.14792},
  eprint = {2605.14792},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.14792},
}
RIS
TY  - UNPB
TI  - Thermal expansion of FeWO_4 (Ferberite) and FeWO_4:Fe_2WO_6 (7:1): a comparative X-ray and neutron diffraction study
AU  - O. Fabelo
AU  - L. Cañadillas-Delgado
AU  - D. Vie
AU  - E. Matesanz
AU  - J. Gonzalez-Platas
AU  - D. Errandonea
PY  - 2026
DA  - 2026/05/14
PB  - arXiv
DO  - 10.48550/arxiv.2605.14792
UR  - https://arxiv.org/abs/2605.14792
AB  - The thermal expansion of natural FeWO_4 (ferberite) and synthetic FeWO_4:Fe_2WO_6 (7:1) was investigated over the 2-1123 K temperature range combining single-crystal and powder X-ray diffraction together with neutron powder diffraction. High-precision lattice parameters were obtained for both samples. The temperature dependence of the unit-cell volume was analysed using physically based thermodynamic models, including the Kroll and Berman approaches as implemented in EoSFit7. All datasets are well reproduced within their respective temperature intervals. However, significant differences are observed between the behavior of ferberite and FeWO_4:Fe_2WO_6, which has a \~40% smaller thermal expansion coefficient and a reduced reference volume. Possible origins, including microstructural and phase-coexistence effects, are discussed. The results provide a comprehensive description of the thermal expansion behavior of FeWO_4 across a wide temperature range.
ER  -