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The chemical formula of mineral Algodonite is indicated by Cu6As. It is most commonly found in hydrothermal deposits associated with other copper arsenides. Algodonite is usually found at its type of locality at Algodones Silver Mine, Coquimbo, Chile. This mineral was named after its locality. Algodonite is known to crystallize 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 Algodonite has no cleavage even when it is evaluated closely with the aid of polarized microscopes for mineralogists. Algodonitee is usually found gray, silver white, or steel gray color in hand sample. It usually tarnishes to dull bronze. The specific gravity measure of the mineral usually ranges from 8.38 to 8.72 grams per cubic centimeters. Most crystals of mineral Algodonite are found opaque in appearance. Algodonite is usually found showing subconcoidal fracture when viewed under polarized microscopes used in optical mineralogy. Fractures usually developed in brittle materials characterized by semi-curving surfaces. The crystal habit of mineral Algodonite usually include massive to granular forms. This is a common texture observed in granite and other igneous rock. It usually tarnishes or forming a surface oxidation film on freshly fracture surfaces. The hardness measure of the mineral when it is evaluated using the Mohs scale method is usually found 4. Mineral Algodonite is a non-fluorescen mineral. It is alsoa non-magnetic mineral. When viewed in reflected light of polarizing microscope, Algodonite usually exhibits a metallic luster. Algodonite usually shows weak anisotrophism when viewed between crossed nicols of petrographic polarizing microscopes used in optical mineralogy. The interference colors reflected by this mineral includes bright cream white. Mineral Algodonite is a non-radioactive mineral as evaluated.



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Tuesday, March 30th, 2010 at 9:34 am
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Optical Mineralogy
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