What are the Factors affecting extinction angle?

The extinction angle, which is the angle at which light is extinguished when viewed through a polarized filter, is influenced by factors such as the crystal structure of the mineral, the orientation of the crystal in relation to the light source, and the wavelength of the light used. Additionally, the presence of impurities and the temperature can also affect the extinction angle by altering the refractive index and birefringence of the material. Understanding these factors is crucial in mineralogy and crystallography for identifying minerals and their properties.