| Reference Type | Journal (article/letter/editorial) |
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| Title | On 'winchite' from the original locality at Kajlidongri, India |
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| Journal | Mineralogical Magazine |
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| Authors | Nayak, V. K. | Author |
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| Leake, Bernard E. | Author |
| Year | 1975 (December) | Volume | 40 |
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| Issue | 312 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_40/40-312-395.pdf+ |
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| DOI | doi:10.1180/minmag.1975.040.312.08Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 6895 | Long-form Identifier | mindat:1:5:6895:0 |
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| GUID | 0 |
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| Full Reference | Nayak, V. K., Leake, Bernard E. (1975) On 'winchite' from the original locality at Kajlidongri, India. Mineralogical Magazine, 40 (312) 395-399 doi:10.1180/minmag.1975.040.312.08 |
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| Plain Text | Nayak, V. K., Leake, Bernard E. (1975) On 'winchite' from the original locality at Kajlidongri, India. Mineralogical Magazine, 40 (312) 395-399 doi:10.1180/minmag.1975.040.312.08 |
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| In | (1975, December) Mineralogical Magazine Vol. 40 (312) Mineralogical Society |
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| Abstract/Notes | SummaryA new analysis of the violet amphibole from the original locality where winchite came from agrees with another recent analysis in differing substantially from the original winchite composition and is (K0·17Na2·10Ca0·23)(Al0·19Ti0·00Fe31·27Fe20·01Mn0·07Mg3·34)Si8·01O22·05(OH)1·95. It is essentially a magnesio-arfvedsonite. Although it is possible that the original analysis was unreliable, evidence is given to support the alternative view that there is a wide range of blue alkali and soda calcic amphibole compositions at Kajlidongri and the name winchite should be restricted to compositions between ferri-winchite CaNaMg5Fe3+Si8O22(OH,F,Cl)2 and alumino-winchite CaNaMg5Al Si8O22(OH,F,Cl)2. X-ray, density, and optical data on the analysed mineral are given. |
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