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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Alabandite is indicated by MnS. It is usually found at epithermal sulfide vein deposits. Alabandite is most commonly found occuring at its type of locality at Alabanda, Aydin, Turkey. Alabandite was named after its type of locality. This mineral 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 Alabandite is usually found with perfect cleavage in three directions which can be seen more clearly exhibited when viewed with the aid of polarized microscopes used in optical mineralogy. Alabandite is usually found black, lead gray or brownish gray in hand samples. The specific gravity measure of the mineral Alabandite is usually found ranging from 3.95 to 4.04 grams per cubic centimeters. Most crystals of mineral Alabandite are found opaque in appearance. Alabandite usually shows uneven fracture when viewed under polarized microscope. In the field of optical mineralogy, this is an appearance of flat surfaces, not the cleavage, that are fractured in an uneven pattern. The crystal habit of mineral Alabandite as described in the field of optical mineralogy usually include dessimenated forms that occurs in small, distinct particles dispersed in matrix. Alabandite can be also found granular in form. When evaluated with the aid of polarizing microscops, this generally occurs as anhedral to subhedral crystals in matrix. They can be also found in massive forms, the common texture observed in granite and other igneous rock. The hardness measure of mineral Alabandite when it is evaluated using the Mohs scale method is usually found ranging from 3.5 to 4. Alabandite is a non-fluorescen mineral. Mineral Alabandite is most commonly found exhibiting submetallic luster when viewed in reflected light of polarized microscope used in optical mineralogy. Alabandite is a non-magnetic mineral. It is most commonly found leaving a dark green streak when rubbed on a white porcelain streak plate. Mineral Alabandite is an isotropic mineral and the intereference color that is always reflected by the mineral under polarizing microscope is usually gray white. Mineral Alabandite is not radioactive as evaluated.



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Tuesday, March 30th, 2010 at 9:19 am
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Optical Mineralogy
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Click Here For Best Selection Of High Quality Polarizing Microscope