| Reference Type | Journal (article/letter/editorial) |
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| Title | Zn-rich staurolite from the Uvete area, central Kenya |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Miyake, Akira | Author |
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| Year | 1985 (September) | Volume | 49 |
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| Issue | 353 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_49/49-353-573.pdf+ |
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| DOI | doi:10.1180/minmag.1985.049.353.11Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 3765 | Long-form Identifier | mindat:1:5:3765:9 |
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| GUID | 0 |
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| Full Reference | Miyake, Akira (1985) Zn-rich staurolite from the Uvete area, central Kenya. Mineralogical Magazine, 49 (353) 573-578 doi:10.1180/minmag.1985.049.353.11 |
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| Plain Text | Miyake, Akira (1985) Zn-rich staurolite from the Uvete area, central Kenya. Mineralogical Magazine, 49 (353) 573-578 doi:10.1180/minmag.1985.049.353.11 |
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| In | (1985, September) Mineralogical Magazine Vol. 49 (353). Mineralogical Society |
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| Abstract/Notes | AbstractZn-rich staurolite occurs in a pelitic gneiss from the Uvete area, central Kenya. The rock was metamorphosed to staurolite-kyanite grade during the Mozambique metamorphism. Microprobe analyses of the staurolite gave the following values (in wt. %): SiO2 26.2–27.3, Al2O3 52.4–53.5, FeO 8.3–9.2, MgO 2.2–2.6, and ZnO 6.0–7.5. Cell dimensions are a = 7.874(± 0.003), b = 16.620(±0.006), c = 5.656(±0.002) Å and β = 90.00 (± 0.002)°. Optical properties are 2Vz = 82–85°, α = 1.742 (±0.002), β = 1.747(±0.002) and γ = 1.753(±0.002). The optical dispersion is moderate and r > v. Density is 3.83(±0.01) g/cm3. Infra-red absorption spectra were also recorded. The cation correlation suggests that the principal substitutions in the staurolite are Zn ⇆ Fe in the tetrahedral sites in the hydroxide sheet and Al ⇆ Mg in the octahedral sites. |
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