| Reference Type | Journal (article/letter/editorial) |
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| Title | Incorporation of W⁶⁺ into hematite (α-Fe₂O₃) in the form of ferberite nanolamellae |
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| Journal | European Journal of Mineralogy |
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| Authors | Majzlan, J. | Author |
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| Bolanz, R. | Author |
| Göttlicher, J. | Author |
| Števko, M. | Author |
| Mikuš, T. | Author |
| Čaplovičová, M. | Author |
| Filip, J. | Author |
| Tuček, J. | Author |
| Rößler, C. | Author |
| Matthes, C. | Author |
| Year | 2025 | Volume | < 37 > |
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| Page(s) | 101-110 | Issue | < 1 > |
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| URL | |
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| DOI | doi:10.5194/ejm-37-101-2025Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 18076738 | Long-form Identifier | mindat:1:5:18076738:4 |
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| GUID | 0 |
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| Full Reference | Majzlan, J., Bolanz, R., Göttlicher, J., Števko, M., Mikuš, T., Čaplovičová, M., Filip, J., Tuček, J., Rößler, C., Matthes, C. (2025) Incorporation of W⁶⁺ into hematite (α-Fe₂O₃) in the form of ferberite nanolamellae. European Journal of Mineralogy, 37 (1). 101-110 doi:10.5194/ejm-37-101-2025 |
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| Plain Text | Majzlan, J., Bolanz, R., Göttlicher, J., Števko, M., Mikuš, T., Čaplovičová, M., Filip, J., Tuček, J., Rößler, C., Matthes, C. (2025) Incorporation of W⁶⁺ into hematite (α-Fe₂O₃) in the form of ferberite nanolamellae. European Journal of Mineralogy, 37 (1). 101-110 doi:10.5194/ejm-37-101-2025 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The industrial demand for tungsten (W) is steadily rising, leading to increase in mining and subsequent release into the environment. In this work, we investigated the uptake of W into the crystal structure of hematite (α-Fe2O3) as a potential immobilization mechanism. Natural zoned crystals from the low-sulfidation epithermal deposit Banská Hodruša, with up to 5.0 wt % WO3, were used. The 57Fe Mössbauer spectroscopy at room temperature showed that the hematite studied consists of two magnetic structures, one of them below and one of them above the Morin transition. The two magnetic structures are caused by the presence of W-rich and W-poor regions in hematite. The W-rich regions must be intimately intergrown with the hematite host to influence the magnetic ordering in substantial volumes of the hematite structure. X-ray absorption spectra in the W-rich regions of hematite were described very well by a structural model of ferberite (FeWO4). Transmission electron microscopy (TEM) identified nanolamellae of ferberite and magnetite that were epitaxially intergrown with the hematite host. Electron energy loss spectroscopy (EELS) confirmed that iron occurs mostly as Fe2+ in the W-rich lamellae. Mössbauer spectroscopy, X-ray absorption spectroscopy (XAS), and TEM converge, at different spatial scales, to a model where W6+ is not taken up by hematite itself but by ferberite nanodomains intergrown with hematite. |
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