Structural Variations across Wolframite Solid Solutions, (Fe,Mn)WO4
| Autor: | Darren A. Umbsaar, Sytle M. Antao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Geology
010502 geochemistry & geophysics 010403 inorganic & nuclear chemistry Geotechnical Engineering and Engineering Geology chemistry Mineralogy 01 natural sciences 0104 chemical sciences wolframite solid solutions structure synchrotron high-resolution powder X-ray diffraction (HRPXRD) Rietveld structure refinement 0105 earth and related environmental sciences QE351-399.2 |
| Zdroj: | Minerals; Volume 12; Issue 1; Pages: 42 Minerals, Vol 12, Iss 42, p 42 (2022) |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min12010042 |
| Popis: | The crystal structure of four samples from natural wolframite solid solutions, (Fe,Mn)WO4, was obtained with synchrotron high-resolution powder X-ray diffraction (HRPXRD) data, Rietveld refinements, space group P2/c, and Z = 2. Wolframite solid solutions extend from ferberite (FeWO4) to hübnerite (MnWO4). The W and (Mn,Fe) cations are in six-fold coordination. This study shows that the unit-cell parameters, a, b, c, and β angle, vary linearly with the unit-cell volume, V, across the wolframite series. The average distance increases linearly because of larger Mn2+ (0.83 Å) replacing smaller Fe2+ (0.78 Å) cations, whereas the average distance increases slightly because of the higher effective charge of the smaller Fe2+ cation. The distortions of the two types of polyhedra across the series are discussed. |
| Databáze: | OpenAIRE |
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