Tocher, F. E. (1962) Extinction curves and 2V: a stereographic solution. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (256) 52-58 doi:10.1180/minmag.1962.033.256.08
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Extinction curves and 2V: a stereographic solution | ||
| Journal | Mineralogical Magazine and Journal of the Mineralogical Society | ||
| Authors | Tocher, F. E. | Author | |
| Year | 1962 (March) | Volume | 33 |
| Issue | 256 | ||
| Publisher | Mineralogical Society | ||
| Download URL | https://rruff.info/doclib/MinMag/Volume_33/33-256-52.pdf+ | ||
| DOI | doi:10.1180/minmag.1962.033.256.08Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 5665 | Long-form Identifier | mindat:1:5:5665:0 |
| GUID | 0 | ||
| Full Reference | Tocher, F. E. (1962) Extinction curves and 2V: a stereographic solution. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (256) 52-58 doi:10.1180/minmag.1962.033.256.08 | ||
| Plain Text | Tocher, F. E. (1962) Extinction curves and 2V: a stereographic solution. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (256) 52-58 doi:10.1180/minmag.1962.033.256.08 | ||
| In | (1962) Mineralogical Magazine Vol. 33 (256) Mineralogical Society | ||
| Abstract/Notes | Summary Utilizing the Biot-Fresnel construction in reverse, the magnitude and sign of the optic axial angle of a biaxial crystal are determinable from the stereogram of the extinction curves. Refinements in the determination of the extinction curves include the use of conoscopic observations, and of crystal cylinders instead of irregular fragments or entire crystals. Direct 2V measurements on some of the material investigated by this method show that this indirect and graphical approach permits the location of each optic axis to within ¼° of its true position. | ||
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