| Reference Type | Journal (article/letter/editorial) |
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| Title | A possible source of error in the determination of symmetry from optical extinction-angles |
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| Journal | Mineralogical Magazine and Journal of the Mineralogical Society |
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| Authors | Hey, Max H. | Author |
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| Year | 1933 (June) | Volume | 23 |
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| Issue | 141 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_23/23-141-367.pdf+ |
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| DOI | doi:10.1180/minmag.1933.023.141.02 |
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| Generate Citation Formats |
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| Mindat Ref. ID | 7161 | Long-form Identifier | mindat:1:5:7161:5 |
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| GUID | 0 |
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| Full Reference | Hey, Max H. (1933) A possible source of error in the determination of symmetry from optical extinction-angles. Mineralogical Magazine and Journal of the Mineralogical Society, 23 (141) 367-370 doi:10.1180/minmag.1933.023.141.02 |
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| Plain Text | Hey, Max H. (1933) A possible source of error in the determination of symmetry from optical extinction-angles. Mineralogical Magazine and Journal of the Mineralogical Society, 23 (141) 367-370 doi:10.1180/minmag.1933.023.141.02 |
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| In | (1932) Mineralogical Magazine Vol. 23 (141) Mineralogical Society |
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| Abstract/Notes | During an optical examination of many mesolite crystals with a view to a determination of their symmetry, the author was puzzled to find that whereas mesolite has generally been described as anorthic, on optical evidence, he could detect no trace of inclined extinction in the prism zone. A. Cavinato (1926) 1 and G. Ceshro (1909) 3 had already made similar observations. Further study revealed the probable causes of the discrepancies, and as these sources of error, and the precautions necessary for their avoidance, receive little or no mention in the principal text-books, an account of them might be of some use. |
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