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Click Here For Best Selection Of High Quality Polarizing Microscope

Click Here For Best Selection Of High Quality Polarizing Microscope

The chemical formula of mineral Armangite is indicated by Mn2+26As18O50(OH)4(CO3). This mineral is usually found on a museum specimen collected from a metamorphosed Fe-Mn deposit. It is most commonly found at its type of locality at Langban, Varmland, Sweden. Armangite was named for Arsenic and MANGanese in the composition. Armangite is known to crystallize in the trigonal system of crystal formation.

            Armangite is usually found showing good cleavage in one direction that can be seen more clearly visible when viewed with the aid of petrographic polarizing microscope used in the field of optical mineralogy. Armangite is usually found colored black in hand samples. The specific gravity measure of mineral Armangite is usually found 4.43 grams per cubic centimeters. Most crystals of mineral Armangite are found transparent to opaque in appearance. The hardness measure of the mineral when it is evaluated using the Mohs scale method is usually found 4. Mineral Armangite is most commonly found leaving brown streak when rubbed on white porcelain streak plate. Armangite is usually found showing uniaxial negative figure when evaluated between crossed nicols of petrographic polarizing microscope for mineralogists. Armangite is also commonly found showing 0.0200 birefringence. Armangite is a non-radioactive mineral as evaluated.



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Wednesday, June 30th, 2010 at 1:27 am
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Optical Mineralogy
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Click Here For Best Selection Of High Quality Polarizing Microscope