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The chemical formula of mineral Aurivilliusite is indicated by Hg+Hg++OI. This mineral is usually found forming in a cm-wide quartz vein with other mercury compounds. Related to terlinguaite; new structure type. Mineral Aurivilliusite is most commonly found at its type of locality at a small prospect pit near the long-abandoned Clear Creek mercury mine, New Idria district, San Benito County, California, USA. Mineral Aurivilliusite was named for Karin Aurivillius (1920-1982), chemist-crystallographer at the University of Lund, Sweden, who determined the crystal structure of numerous synthetic Hg compounds. Mineral Aurivilliusite 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. Aurivilliusite is also most commonly found showing distinct cleavage in one direction which can be found more clearly exhibited when mineral is evaluated with the aid of petrographic polarizing light microscope used in the field of optical mineralogy. Mineral Aurivilliusite is most commonly found colored dark gray black. Most crystals of mineral Aurivilliusite are found opaque in appearance. It is also commonly found showing brittle to uneven fracture when viewed closely with the ai of polarized microscope. This is actually a very brittle fracture producing uneven fragments. The crystal habit of mineral Aurivilliusite as described in the field of optical mineralogy usually inludes encrustations that form crust-like aggregates on matrix. This can be found more clearly visible when viewed closely with the aid of polarized microscope for mineralogists. Aurivilliusite is most commonly found showing metallic luster when viewed in reflected light of polarizing microscope used in the field of optical mineralogy. Mineral Aurivilliusite is also usually found leaving a dark red brown streak when rubbed on a white porcelain streak plate. Aurivilliusite is a non-radioactive mineral as evaluated.



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Thursday, September 30th, 2010 at 3:28 pm
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Optical Mineralogy
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