| Reference Type | Journal (article/letter/editorial) |
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| Title | The petrographic use of the spindle stage and focal-plane screening in the determination of the optical variation of some zoned minerals |
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| Journal | Mineralogical Magazine and Journal of the Mineralogical Society |
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| Authors | Wright, Hedley G. | Author |
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| Year | 1965 (December) | Volume | 35 |
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| Issue | 272 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_35/35-272-656.pdf+ |
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| DOI | doi:10.1180/minmag.1965.035.272.10Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 5933 | Long-form Identifier | mindat:1:5:5933:0 |
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| GUID | 0 |
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| Full Reference | Wright, Hedley G. (1965) The petrographic use of the spindle stage and focal-plane screening in the determination of the optical variation of some zoned minerals. Mineralogical Magazine and Journal of the Mineralogical Society, 35 (272) 656-660 doi:10.1180/minmag.1965.035.272.10 |
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| Plain Text | Wright, Hedley G. (1965) The petrographic use of the spindle stage and focal-plane screening in the determination of the optical variation of some zoned minerals. Mineralogical Magazine and Journal of the Mineralogical Society, 35 (272) 656-660 doi:10.1180/minmag.1965.035.272.10 |
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| In | (1965) Mineralogical Magazine Vol. 35 (272) Mineralogical Society |
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| Abstract/Notes | SummaryThe Equivibration Curve technique of Joel (1963) is used to determine the orientation of a zoned mineral on the spindle stage axis and an average value for 2V. A bracketing method enables the extreme values of each refractive index to be determined for sodium light on a single grain, using the Focal-plane Screening technique of Cherkosov (1960). |
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