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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Bianchite is indicated by the (Zn,Fe++)(SO4)•6(H2O). Bianchite mineral is most commonly found occuring as a post-mine mineral, typically in efflorescences on mine walls, an alteration product of oxidizing sulfides. Bianchite is most occuring at its type at Cave del Predil, Raibl mine, south of Tarvisio, Friuli-Venezia Giulia, Italy. This mineral was named for Angelo Bianchi (1892-1970), Italian mineralogist, University of Padova, Padova, Italy. This mineral Bianchite 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 Bianchite is usually found colorless, yellow, yellowish white light blue or white in hand sample. The specific gravity measure of mineral Bianchite is usually found 2.03 grams per cubic centimeters. Most crystals of mineral Bianchite are found transparent in appearance. The hardness measure of mineral Bianchite is usually found 2.5 when specimen is evaluated using the Mohs scale method. Mineral Bianchite is commonly found showing vitreous or glassy luster when evaluated closely in reflected light of polarizing microscope for mineralogists. Mineral Bianchite is commonly found leaving white streak when rubbed on white porcelain streak plate. Bianchite is usually found showing biaxial negative figure when viewed closely under polarized microscope used in the field of optical mineralogy. Mineral Bianchite is also commonly showing 0.0300 birefringence. Bianchite is also a non-radioactive mineral as evaluated.



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Friday, November 26th, 2010 at 3:43 pm
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Optical Mineralogy
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