| Reference Type | Journal (article/letter/editorial) |
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| Title | Manganese incorporation in synthetic hercynite |
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| Journal | Mineralogical Magazine |
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| Authors | Bromiley, G. D. | Author |
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| Gatta, G. D. | Author |
| Stokes, T. | Author |
| Year | 2015 (June) | Volume | 79 |
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| Issue | 3 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/minmag.2015.079.3.09Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 244658 | Long-form Identifier | mindat:1:5:244658:9 |
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| GUID | 0 |
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| Full Reference | Bromiley, G. D., Gatta, G. D., Stokes, T. (2015) Manganese incorporation in synthetic hercynite. Mineralogical Magazine, 79 (3) 635-647 doi:10.1180/minmag.2015.079.3.09 |
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| Plain Text | Bromiley, G. D., Gatta, G. D., Stokes, T. (2015) Manganese incorporation in synthetic hercynite. Mineralogical Magazine, 79 (3) 635-647 doi:10.1180/minmag.2015.079.3.09 |
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| Abstract/Notes | AbstractManganese incorporation in synthetic hercynite, and partitioning between hercynite and silicate melt synthesized at 1.0 GPa, 1250°C, and at an fO2 buffered by Fe–FeO, has been studied by X-ray absorption spectroscopy and single-crystal X-ray structure refinement. Spectra indicate the presence of both Mn2+ and Mn3+ (and possibly also Mn4+) in synthetic hercynite and partitioning of Mn2+ into the melt phase, and Mn3+ into hercynite, respectively, under run conditions. X-ray refinement is consistent with partial disorder of Fe and Al across tetrahedral and octahedral sites. A higher than expected degree of Fe-Al disorder in the Mn-bearing hercynite can be explained by preferential incorporation of Mn2+ onto the tetrahedral site, and indicates that Fe-Al disorder in pure, stoichiometric hercynite cannot necessarily be used to determine closure temperatures in natural spinel. However, partitioning of Mn2+ and Mn3+ between melt and hercynite suggests that Mn incorporation in hercynite could be used as a measure of fO2 conditions in magmas during spinel crystallization. |
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