Determination of 2V angle in plagioclase by the analytical method using φ values multiple of 90º
DOI:
https://doi.org/10.1590/S0071-12761971000100003Abstract
The 2V angle of plagioclases is determined through a computer program by the analytical method of Chomard. Determinations involved 28 individuals of which seven with two repetitions. Twelve different extinction operations were used as a result of the combinations: φ= 0º, φ= 90º, φ= 180º, φ= 270º and Θ = 15º, Θ = 30º, Θ = 45º. For the extinction operations used the application of the analytical method to plagioclases should be avoided.Downloads
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Published
1971-01-01
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naodefinida
How to Cite
Abrahão, I. O. (1971). Determination of 2V angle in plagioclase by the analytical method using φ values multiple of 90º . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 28, 69-81. https://doi.org/10.1590/S0071-12761971000100003