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The chemical composition of mineral Jungite is indicated by the formula Ca2Zn4Fe3+8(PO4)9(OH)9•16(H2O). Mineral Jungite is also commonly found from its type of locality at Hagendorf Sud pegmatite, Barvaria, Germany. Jungite was named for Gerhard Jung, German mineral collector who found the mineral. Jungite is known to crystallize in the orthorhombic system of crystal formation. In optical mineralogy, this orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. Mineral Jungite is known to have perfect cleavage in one direction which can be more clearly exhibited when evaluated between crossed nicols of polarized microscope. Mineral Jungite is also usually found colored dark green, yellow, or green yellow in hand sample. The density measure of mineral Jungite is usually found 2.843 grams per cubic centimeters. The crystal habit of mineral Jungite as described in the field of optical mineralogy usually includes rosette forms showing bundled tabular aggregates resembling rose flower petals. It can be also found tabular in form showing dimensions that are thin in one direction. The hardness measure of mineral Jungite is usually found 1 when evaluated using the Mohs scale method. Jungite is reflecting vitreous or silky luster when viewed in reflected light of polarizing microscope for mineralogists. It is leaving a yellow streak when rubbed on white porcelain streak plate. Mineral Jungite is also showing biaxial negative figure with 0.0060 birefringence when specimen is evaluated between crossed nicols of polarizing microscope. Mineral Jungite is also known to have strong dispersion. Mineral Jungite is found to be not radioactive when chemically evaluated.



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Thursday, December 29th, 2011 at 8:56 am
Category:
Optical Mineralogy
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