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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Alarsite is indicated by Al(AsO)4. Alarsite is a known product of fumarolic exhalations. It is most commonly found at its type of locality at the Tolbachik Main fracture eruption, Kamchatka, Russia. Alarsite was named from its chemical composition of Aluminum and Arsenic. Alarsite is known to crystallize in the trigonal-trapezohedral system of crystal formation. It has no cleavage found even if the mineral sample is closely evaluated with the aid of petrographic polarizing light microscope used in the field of optical mineralogy.

            Alarsite is usually found colorless, yellowish, pale green or bluish in hand sample. It is usually found showing very splendid images under polarized microscope used in the field of optical mineralogy. The specific gravity measure of the mineral usually ranges from 3.32 to 3.35 grams per cubic centimeters. Most crystals of mineral Alarsite if found in thin section are usually transparent in appearance. When viewed closely under polarizing microscope, Alarsite is usually found showing brittle fracture. This is generally displayed by glasses and most non-metallic minerals. The crystal habit of the mineral Alarsite as described in the field of optical mineralogy usually includes anhedral grains. These are usually granular minerals without the expression of crystal shapes. Alarsite is also sometimes found having encrustrations. These forms crust-like aggregates on matrix. The hardness measure of the mineral when it is evaluated using the Mohs scale method is usually found 3. Alarsite is a non-fluorescent mineral. When evaluated in reflected light of petrographic polarizing microscope, Alarsite is most commonly found showing vitreous or glassy luster. Alarsite is most commonly found leaving a white streak when rubbed on a white porcelain streak plate. Mineral Alarsite is usually found showing colorless dichroic color when viewed under polarizing microscope. When evaluated between crossed nicols of petrographic polarizing microscope, Alarsite is usually showing uniaxial positive figure and a 0.0120 birefringence. Alarsite is a non-radioactive mineral as evaluated.



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Tuesday, March 30th, 2010 at 9:22 am
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Optical Mineralogy
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Click Here For Best Selection Of High Quality Polarizing Microscope