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The chemical formula of mineral Boothite is indicated by CuSO4•7(H2O). Boothite is considered as a secondary mineral in sulfide ores. It is also known as an ephemeral mineral and virtually impossible to preserve in an artifcial environment. Boothite is commonly found at its type of locality at Alma pyrite mine, Leona Heights, Alameda Co. California. Burraga, New South Wales. Mineral Boothite was named for Edward Booth (1857-1917), American chemist, University of California. Boothite 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 Boothite is usually found exhibitin indistinct cleavage in two directions. All of which can be found more clearly visible when viewed closely under polarizing microscope used in the field of optical mineralogy. Boothite is usually found colored blue in hand sample which can be found more interesting when evaluated under petrographic polarizing microscopes used in the field of optical mineralogy. The specific gravity measure of this mineral is commonly found 2.1 grams per cubic centimeters. Most Boothite crystals are found transparent to translucent in appearance. The crystal habit of mineral Boothite as described in the field of optical mineralogy is usually found massive with uniformly indistinguishable crystals forming large masses. The hardness measue of this mineral is usually found ranging from 2 to 2.5 when evaluated using the Mohs scale method. Boothite is found to be a non-fluorescent mineral. It is also non-magnetic as evaluated. Boothite is commonly found leaving a pale blue streak when rubbed on a white porcelain streak plate. Boothite is commonly found showing biaxial negative figure when evaluated between crossed nicols of polarized microscope used in the field of optical mineralogy. It is also most commonly found with 0.0200 birefringence. Mineral Boothite is found to be non-radioactive as evaluated.



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Saturday, February 19th, 2011 at 7:52 am
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Optical Mineralogy
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