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The chemical formula of mineral Calcjarlite is indicated by Na(Ca,Sr)3Al3(F,OH)16. This mineral is usually found forming in a fluorite vein in quartz-mica schists. Calcjarlite is commonly found from an undefined locality on the upper right Noyba River, left tributary to the Teya River, Yenisei Ridge, Siberia, Russia. Calcjarlite was named as a CALCium analog of “jarlite.” Mineral Calcjarlite 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. Calcjarlite has no cleavage displayed even if evaluated closely under polarizing microscopes for mineralogists. Calcjarlite is usually found white in hand sample. The density measure of the mineral is usually found 3.51 grams per cubic centimeters. Calcjarlite is usually found showing uneven fracture with flat surfaces (not cleavage) fractured in an uneven pattern. The hardness measure of mineral Calcjarlite is usually found 4 when evaluated using the Mohs scale method. Calcjarlite is commonly found leaving a white streak when rubbed on white porcelain sreak plate. Mineral Calcjarlite is also commonly showing biaxial positive figure when viewed between crossed nicols of polarizing microscopes. It is also commonly found showing 0.0070 birefringence. Calcjarlite is found to be not radioactive.



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Friday, April 29th, 2011 at 8:27 am
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Optical Mineralogy
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