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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Zippeite is indicated by the formula K4(UO2)6(SO4)3OH10 – 4H2O or Hydrated Potassium Uranyl Sulfate Hydroxide. Zippeite is actually a Sulfate mineral. It is considered as a minor ore of uranium and it is also most commonly used as mineral specimen. Zippeite is actually a rare mineral that is usually sought after by most collectors who seek for uranium bearing minerals as well as those with exotic names. Zippeite is a fluorescent mineral under ultraviolet light. However, the mineral is inconsistent in the color that is produced that can be clearly viewed under polarized microscopes used in the field of optical mineralogy. Some Zippeite specimens are known to be result of human intervention and some mineralogists do not consider these to be pure mineral specimens. It is important to note that Zippeite is a radioactive mineral and therefore it should be stored away from other minerals that are affected by radioactivity and human exposure should be limited.

             Zippeite is most commonly found in various shades of golden-yellow to orange-yellow and sometimes brown in color that appears more interesting when viewed with the aid of petrographic polarizing light microscopes used in the field of optical mineralogy. Zippeite is most commonly found showing dull luster when viewed in reflected light of polarizing microscopes used in optical mineralogy. Most crystals of mineral Zippeite can be found transparent to translucent in appearance. Zippeite 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. The crystal habit of mineral Zippeite is usually limited to encrustations and also as compact masses. 

            Mineral Zippeite has no cleavage even when it is closely evaluated with the aid of petrographic polarizing light microscopes used in the field of optical mineralogy. The hardness measure of the mineral is approximately 3.7+ grams per cubic centimeters, which is considered above average for non-metallic minerals. Zippeite is also most commonly found leaving a pale yellow streak when rubbed on a white porcelain streak plate. Zippeite is most commonly found associated with other minerals including autunite, Uraninite, torbernite and other uranium minerals. Zippeite is a radioactive mineral and it fluoresces in different colors from different specimens when closely evaluated with the aid of petrographic polarizing light microscopes used in optical mineralogy. The best field indicators of mineral Zippeite usually include color, crystal habit, softness, fluorescence, radioactivity and luster. Zippeite is usually formed as secondary mineral and as an efflorescent crust in uranium mines. In the field of optical mineralogy, efflorescent means it forms on the surface of a rock by the evaporation off water when contact with the dry air of the mine. Zippeite notably occurs at Cornwall, England as well as in the Bohemian region of Europe and some areas in the United States including Utah and Colorado.



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Saturday, November 28th, 2009 at 10:45 am
Category:
The Sulfates Mineral Class
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