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The chemical composition of mineral Clinoungemachite is indicated by the formula K3Na9Fe3+(SO4)6(OH)3•9(H2O). Chuquicamata, Chile. Clinoungemachite was named from its crystal form and for Henri-Leon Ungemach (1880-1936), Belgian crystallographer. Mineral Clinoungemachite 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. Mineral Clinoungemachite is commonly found colorless, white or light yellow in hand sample. Most crystals of mineral Clinoungemachite are found transparent in hand sample. Mineral Clinoungemachite is also found showing vitreous or glassy luster when viewed in reflected light of polarized light microscopes. Mineral Clinoungemachite is usually found leaving a white streak when rubbed on white porcelain streak plate. Mineral Clinoungemachite has barely detectable radioactivity.



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Saturday, July 30th, 2011 at 2:46 am
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Optical Mineralogy
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