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The chemical formula of composition of mineral Carlosturanite is indicated by the formula (Mg,Fe++,Ti,Mn)21(Si,Al)12O28(OH)34. This mineral is most commonly found occuring in a network of veins crosscutting a metamorphic antigorite serpentinite, in an ophiolite. Mineral Carlosturanite is usually found at its type of locality in Italy, at a number of localities around Sampeyre and Calsteldelfino, Varaita Valley. Carlosturanite was named for Prof. Carlo Sturani (1938-1976), University of Torino, Torino, Italy. Mineral Carlosturanite 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. Mineral Carlosturanite is commonly found with perfectin one direction and parting is also visible when evaluated under petrographic polarizing microscopes for mineralogists. Mineral Carlosturanite is commonly found colored light brown in hand sample. The density measure of mineral Carlosturanite is usually found 2.63 grams per cubic centimeters. Most crystals of mineral Carlosturanite are found transparent in appearance. Most crystals of mineral Carlosturanite are flexible with flexible fragments. Carlosturanite are usually found with fibrous crystals made up of fibers. The hardness measure of mineral Carlosturanite is usually found 2.5 when evaluated using the Mohs scale method. Mineral Carlosturanite is commonly found showing vitreous to pearly luster in reflected light of polarizing microscopes. Mineral Carlosturanite are found leaving a white streak when rubbed on white porcelain streak plate. Mineral Carlosturanite is most commonly found showing biaxial figure when evaluated between crossed nicols of polarizing microscopes used in the field of optical mineralogy. Carlosturanite is also found pleochroic showing brown orange pale and brown orange color. Mineral Carlosturanite is found to be not radioactive.



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Monday, May 9th, 2011 at 6:40 am
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Optical Mineralogy
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