Optical Mineralogy
نویسنده
چکیده
II. Polarizing light microscope and geological samples III. Refractive index and its measurement IV. Optical classes-indicatrix theory V. Relationship of optical properties to crystal chemistry VI. Advanced methods in optical mineralogy GLOSSARY anisotropic mineral: A mineral with more than one principal refractive index. birefringence: The mathematical difference between the largest and smallest refractive index for an anisotropic mineral. biaxial mineral: A mineral with three principal refractive indices and two optic axes. Its indicatrix is a triaxial ellipsoid. dispersion: Change of any optical property with wavelength. indicatrix: The three-dimensional surface describing the variation in refractive index with relationship to vibration direction of incident light. isotropic mineral: A mineral with the same refractive index regardless of vibration direction. Its indicatrix is a sphere.
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