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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Avicennite is indicated by Tl2O3. This mineral is usually found in the weathered zone of a hematite-calcite vein cutting banded marmorized and silicified limestones near a granite-gneiss contact, near Dzhuzumli, Tadzhikistan. Mineral Avicennite is most commonly found at its type of locality near the village of Dzhuzumli, Mt. Zirabulaksk region, Bukhara, Tadzhikistan. Avicennite was named for the medieval (Persian) scholar and physician, Abu ‘Ali al-Husayn ibn ‘Abd Allah ibn Sina (Avicenna) (930-1037), who lived in Bukhara, Tadzhikistan. Mineral Avicennite is known to crystallize in the isometric system of crystal formation. In optical mineralogy, this isometric crystal system comprises crystals having three axes, all of which are perpendicular to one another and all are found equal in lengths. Mineral Avicennite has no cleavage even if it is closely evaluated using petrographic polarizing light microscope used in the field of optical mineralogy. Mineral Avicennite is most commonly found grayish black in color which can be more intereting when viewed closely with the aid of polarizing microscope used in the field of optical mineralogy. The specific gravity measure of the mineral Avicennite is usually found 9.574 grams per cubic centimeters. Most crystals of mineral Avicennite are found opaque in appearance. It is also most commonly found showing brittle to conchoidal fracture when viewed closely under polarizing light microscope used in the field of optical mineralogy. This is actually a very brittle fracture producing small, conchoidal fragments. The hardness measure of mineral Avicennite is known to be 2 when it is evaluated using the Mohs scale method. Avicennite is also most commonly found exhibiting metallic luster when viewed in reflected light of polarized microscopes. Mineral Avicennite is most commonly found leaving a grayish black streak when rubbed on a white porcelain streak plate. Avicennite is also known to an isotropic mineral. Avicennite is a non-radioactive mineral as evaluated.



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Thursday, September 30th, 2010 at 3:41 pm
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