Simple stereographic construction for locating the optical axis of uniaxial indicatrix

Authors

  • Ibrahim Octavio Abrahão USP; ESALQ; Departamento de Solos e Geologia
  • Arary Marconi USP; ESALQ; Departamento de Solos e Geologia

DOI:

https://doi.org/10.1590/S0071-12761975000100025

Abstract

A new and simple stereographic construction for locating the optical axis of uni-axial minerals in the universal stage is presented. Two angles are used: θ previously selected and rotated in the A4 (E-W) axis of the universal stage; and ψ, extinction angle measured in the stage of the microscope. The procedure suggests the elaboration of a table, based on θ ψ values.

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Published

1975-01-01

Issue

Vol. 32 (1975)

Section

naodefinida

How to Cite

Abrahão, I. O., & Marconi, A. (1975). Simple stereographic construction for locating the optical axis of uniaxial indicatrix . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 32, 321-325. https://doi.org/10.1590/S0071-12761975000100025