The Determination of the Maximum Extinction-Angle, Optic Axial Angle, and Birefringence in Twinned Crystals of Monoclinic Pyroxenes in Thin Section by the Becke Method

Harvey Collingridge

Mineralogical Magazine; December 1914 v. 17; no. 80; p. 147-149; DOI: 10.1180/minmag.1914.017.80.06
© 1914, The Mineralogical Society
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