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The chemical formula of mineral Belkovite is indicated by Ba3(Nb,Ti)6(Si2O7)2O12. Belkovite is considered as of secondary origin, formed by the alteration of barium-rich pyrochlore during dolomitization of calcite carbonatites in pyroxenites. Belkovite is most commonly fond at its type of locality in the Vuoriyarvi carbonatite complex, Kola Peninsula, Russia. Belkovite was named for I.V. Bel’kov (1917-1989), Soviet mineralogist who explored the Kola Peninsula, Russia. Mineral Belkovite is known to crysytallize in the hexagonal system of crystal formation. In optical mineralogy, the hexagonal system of crystallization comprises crystals having four axes. Three of which are positioned in a single plane with equal length and are symmetrically spaced. The fourth axis is found to be perpendicular to the other three axes.

Mineral Belkovite has no cleavage shown even if the specimen is evaluated closely with the aid of polarizing light microscope used in the field of optical mineralogy. Mineral Belkovite is most commonly found colored brown when evaluated closely under polarizing microscope used in the field of optical mineralogy. The specific gravity measure of mineral Belkovite is most commonly found 4.16 grams per cubic centimeters. Most crystals of mineral Belkovite are found transparent in appearance. The hardness measure of mineral Belkovite is usually found ranging from 6 to 7 when evaluated using Mohs scale method. It is also most commoly found showing adamantine luster when viewed closely under polarizing light microscope used in the field of optical mineralogy. Mineral Belkovite is also most commonly found leaving white streak when rubbed on a white porcelain streak plate. Mineral Belkovite is also most commonly found showing uniaxial positive figure when viewed closely under polarizing microscope. It is also commonly found showing 0.0740 birefringence. Belkovite is a non-radioactive mineral.



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Sunday, October 24th, 2010 at 3:02 am
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Optical Mineralogy
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