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The chemical formula of mineral Cannizzarite is indicated by Pb4Bi6S13. This mineral is associated with deep fumarolic activity. Mineral Cannizzarite is usually from Vulcano, in the Lipari Islands, Italy. Mineral Cannizzarite was named for Stanislao Cannizzaro (1826-1910), celebrated chemist, University of Rome, Italy. Cannizzarite 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 Cannizzarite is usually found colores light gray or silver gray in hand sample. The density measure of mineral Cannizzarite is usually found 6.7 grams per cubic centimeters. Most crystals of mineral Cannizzarite are found opaque in appearance. Crystals of mineral Cannizzarite are found flexible with flexible fragments. Mineral Cannizzarite also is forming aggregates that are made of numerous individual crystals or clusters. Mineral Cannizzarite is also found felted occuring as minute crystalling aggregates with the form of felt material. Cannizzarite is also found forming lath – shaped like a small, thin plaster lath, tabular or rectangular in shape. The hardness measure of mineral Cannizzarite is usually found 2.5 when evaluated using the Mohs scale method. Mineral Cannizzarite is also commonly found showing metallic luster when viewed in reflected light of polarizing microscope for optical mineralogy. Mineral Cannizzarite is commonly found showing strong dispersion exhibiting colors from blue to gray. Mineral Cannizzarite is found to be not radioactive.



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Monday, May 9th, 2011 at 6:36 am
Category:
Optical Mineralogy
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