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The chemical formula of mineral Alumoklyuchevskite is indicated by K3Cu3AlO2(SO4)4. Alumoklyuchevskite usually formed in a volcanic exhalation. Alumoklyuchevskite is usually found at its type of locality at the second cone of the Northern Breakthrough of the Main Tolbachik fracture eruption, Kamchatka, Russia. Alumoklyuchevskite was named as the aluminum dominant analog of klyuchevskite. Alumoklyuchevskite is known to crystallize in the monoclinic system of crystal formation. In optical mineralogy, the monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis.            Alumoklyuchevskite is most commonly found showing perfect cleavage in one direction which can be found more clearly visible when viewed with the aid of polarizing microscope used in the field of optical mineralogy. It is also usually found dark green in color that appears more interesting when viewed under polarized microscope for mineralogists. The specific gravity measure of the mineral Alumoklyuchevskite is usually found 3.1 grams per cubic centimeters. Most crystals of mineral Alumoklyuchevskite are found transparent in appearance. The crystal habit of the mineral Alumoklyuchevskite as described in the field of optical mineralogy usually incudes acicular forms occuring as needle-like crystals. It can be also found shorming prismatic crystals shaped like slender prisms. The hardness measure of the mineral when it is evaluated using the Mohs scale method is most commonly found 2. Mineral Alumoklyuchevskite is also most commonly found showing vitreous luster when viewed in reflected light of polarized microscope used in the field of optical mineralogy. Alumoklyuchevskite is usually found showing biaxial positive figure when evaluated between crossed nicols of petrographic polarizing microscope used in the field of optical mineralogy. It can be also found showing 0.0990 birefringence. Alumoklyuchevskite is most commonly found pleochroic from light green, grayish green to dark green color. Alumoklyuchevskite has a barely detectable radioactivity as evaluated.



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Sunday, May 30th, 2010 at 6:48 am
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Optical Mineralogy
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