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The chemical formula of mineral Brizziite-III is indicated by NaSbO3. Mineral Brizziite-III is known as the result of deep weathering of stibnite. It can be found at its type of locality at the Cetine mine, approximately 20 km SW of Sienna, Tuscany, Italy. This mineral was named for Dr. Giancarlo Brizzi (1936-1992) who discovered the mineral. Brizziite-III is known to crystallize in the trigonal system of crystal forrmtion.it is commonly found showing perfect cleavage in one direction which can be found more clearly exhibited when evaluated closely under polarizing microscopes. Mineral Brizziite-III is usually found colorless in hand sample. The specific gravity measure of mineral Brizziite-III is usually found ranging from 4.8 to 4.95 grams per cubic centimeters, givin an average of 4.87. Most crystals of mineral Brizziite-III are found transparent in appearance. Brizziite-III has unknown fracure. This mineral is too small to observe fractures. Mineral Brizziite-III is usually found showing a crystal habit showing encrustations which is commonly found forming crust-like aggregates on matrix. It can be also found platy structure with sheet forms just like that of micas. The hardness measure of mineral Brizziite-III is usually found 2 when evaluated using the Mohs scale method. Brizziite-III is a non-fluorescent mineral. Brizziite-III is also commonly found leaving a white streak when rubbed on white porcelain streak plate. Brizziite-III is also found dichroic with colorless appearance. Mineral Brizziite-III is also usually found showing uniaxial negative figure whhe evaluatedd etween crossed nicols of polarizing microscopes for mineralogists. It is also commonly found showing 0.2090 birefringence. Brizziite-III is found not radioactive after chemical evaluation.



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Tuesday, March 29th, 2011 at 5:36 am
Category:
Optical Mineralogy
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