| Reference Type | Journal (article/letter/editorial) |
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| Title | The occurrence of iron silicides in a fulgurite: Implications for fulgurite genesis |
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| Journal | The Canadian Mineralogist |
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| Authors | Stefano, Christopher J. | Author |
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| Hackney, Stephen A. | Author |
| Kampf, Anthony R. | Author |
| Year | 2020 (January 16) | Volume | 58 |
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| Issue | 1 |
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| Publisher | Mineralogical Association of Canada |
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| DOI | doi:10.3749/canmin.1900019Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 65637 | Long-form Identifier | mindat:1:5:65637:1 |
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| GUID | 0 |
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| Full Reference | Stefano, Christopher J., Hackney, Stephen A., Kampf, Anthony R. (2020) The occurrence of iron silicides in a fulgurite: Implications for fulgurite genesis. The Canadian Mineralogist, 58 (1) 115-123 doi:10.3749/canmin.1900019 |
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| Plain Text | Stefano, Christopher J., Hackney, Stephen A., Kampf, Anthony R. (2020) The occurrence of iron silicides in a fulgurite: Implications for fulgurite genesis. The Canadian Mineralogist, 58 (1) 115-123 doi:10.3749/canmin.1900019 |
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| In | (2020, January) The Canadian Mineralogist Vol. 58 (1) Mineralogical Association of Canada |
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| Abstract/Notes | ABSTRACT
Rapidly formed eutectic textures are observed in Fe silicides in a fulgurite from Michigan. The 14 cm-diameter fulgurite was formed in sandy glacial till in 2014 near Houghton Lake, Michigan. Spherical droplets of iron silicides up to ∼200 μm in diameter were found in the natural glass. Back-scattered electron images of some droplets show a eutectic intergrowth texture of two iron silicides with individual crystals up to ∼1 μm in maximum dimension. X-ray diffraction study showed the specimens to be an intergrowth of naquite (FeSi) and linzhiite (FeSi2) or naquite and xifengite (Fe5Si3). Droplets also contain minor native silicon, Fe-Ti silicides, and/or other Ti- rich phases which were discovered during TEM observations. It is important to note that the lower-temperature phase luobusaite (Fe3Si7) was not observed in any droplets, indicating rapid quenching of the fulgurite, consistent with a natural origin during a lightning strike as opposed to an artificial origin, e.g., resulting from a downed power line. |
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