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The chemical formula of mineral Clinozoisite is indicated by Ca2Al3(SiO4)3(OH). Clinozoisite is commonly found occurring at metamorphic and contact metasomatic rocks. Clinozoisite was named after its resemblance to zoisite and the monoclinic crystal form. Mineral Clinozoisite is known to crystallize in the monoclinic system of crystal formation. In optical mineralogy, the monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis. Clinozoisite is usually found showing perfect cleavage in one direction when evaluated with the aid of polarizing microscopes used in the field of optical mineralogy. Clinozoisite is usually found colorless, green, gray, yellow green or light yellow in hand sample. The density measure of mineral Clinozoisite is usually found ranging from 3.3 to 3.4 grams per cubic centimeters, giving an average of 3.34. Most crystals of mineral Clinozoisite are found transparent to translucent in appearance. Clinozoisite is also found showing uneven fracture forming flat surfaces, not the cleavage, that is  fractured in an uneven pattern. The crystal habit of mineral Clinozoisite as described in the field of optical mineralogy usually includes fibrous in form where crystals are made up of fibers. Sometimes it is also found massive in form with granular structure. This is a common texture observed in granite and other igneous rock. Sometimes Clinozoisite is also found prismatic in form where crystals are shaped like slender prisms similar to tourmaline. The hardness measure of mineral Clinozoisite is usually found 7 when evaluated using the Mohs scale method. Mineral Clinozoisite is known to be a non-fluorescent mineral. When evaluated in reflected light of polarized microscope, mineral Clinozoisite is commonly found showing vitreous or glassy luster. It is also commonly found leaving a grayish white streak when rubbed on white porcelain streak plate. Mineral Clinozoisite is also known to have biaxial positive figure with birefringence found ranging from 0.0060 to 0.0110 when evaluated between crossed nicols of petrographic polarizing microscopes. Mineral Clinozoisite is also found pleochroic showing colorless, yellow green, yellow green, green, red or pink appearance. Mineral Clinozoisite is also found not radioactive.



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Wednesday, August 31st, 2011 at 4:41 am
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Optical Mineralogy
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