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The chemical formula of mineral Chambersite is indicated by Mn3B7O13Cl. Chambersite is known to be insoluble borate obtained from mining rock salt in a shallow salt dome mine. Mineral Chambersite is commonly found from its type of locality at Barber’s Hill salt dome, Chambers County, Texas, USA. Mineral Chambersitewas named for the locality. Chambersite is known to crystallize in the orthorhmbic system of crystal formation. In optical mineralogy, this orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. Chambersite has no cleavage found. This mineral species is commonly found colorless or sometimes purple red in hand sample. The density measure of mineral Chambersite is usually found 3.49 grams per cubic centimeters. Most crystals of mineral Chambersite are found transparent to translucent in appearance. Chambersite is also found showing conchoidal to uneven fracture. This uneven fracture is usually producing small, conchoidal fragments. The crystal habit exhibited by mineral Chambersite as described in the field of optical mineralogy usually includes euhedral crystals occuring as well-formed crystals showing good external form. It can be also found forming pseudo tetragonal crystals showing a tetragonal shape. The hardness measure of mineral Chambersite is usually found 7 when evaluated using the Mohs scale method. This mineral is commonly found showing vitreous luster in reflected light of polarizing microscope for mineralogists. Mineral Chambersite is commonly found leaving a white streak when rubbed on white porcelain streak plate. This mineral is also found showin biaxial positive figure with 0.0120 birefringence when evaluated between crossed nicols of polarized microscopes. Chambersite is also found not radioactive.



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Thursday, June 30th, 2011 at 3:16 am
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Optical Mineralogy
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