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The chemical formula of mineral Uranopilite is indicated by (UO2)6SO4(OH)10 – 12H2O or Hydrated Uranyl Sulfate Hydroxide. Uranopilite is actually a Sulfate mineral. It is considered as a minor ore of uranium and it is also most commonly used as mineral specimen. Uranopilite is most commonly found showing nice and interesting appearance when viewed with the aid of optical mineralogy. Uranopilite is actually a rare mineral but it is usually sought after by most collectors who seek uranium-bearing minerals. Just like any other uranyl mineral Uranopilite is also fluorescent and is radioactive. It actually fluoresces a bright green color under ultraviolet light. Uranopilite is usually associated with other uranyl minerals. Uranopilite, just like other uranyl minerals such as zippeite and johannite, are efflorescent. In optical mineralogy, efflorescent means it forms on the surface of a rock by the evaporation of water when in contact with the dry air of the mine. It should be noted also that Uranopilite is a radioactive mineral. Therefore, it must be stored away from other minerals that are easily affected by radioactivity. Human exposure should be also limited.

 

            Uranopilite is most commonly found showing bright shades of yellow that can be found more splendidly exhibited when viewed with the aid of petrographic polarizing microscope used in optical mineralogy. Mineral Uranopilite is also commonly found showing silky luster when viewed in reflected light of polarized microscopes for mineralogists. Most crystals of mineral Uranopilite are found transparent to translucent in appearance. It is also 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. The crystal habits of mineral Uranopilite are usually limited to encrustations and compact masses.  

 

Mineral Uranopilite has no cleavage seen even when samples are closely evaluated with the aid of polarized microscopes used in optical mineralogy. The hardness measure of the mineral when it is evaluated using the Mohs scale method is approximately 2. Uranopilite is most commonly found leaving a pale yellow streak when rubbed on a white porcelain streak plate. The specific gravity measure of the mineral is approximately 4.0 grams per cubic centimeters, which is above average for non-metallic minerals. Uranopilite is known to be radioactive mineral. It fluoresces a bright green color in ultra violet light. Uranopilite is usually associated with johannite, Uraninite and zippeite. The best field indicators of mineral Uranopilite usually include color, radioactivity, crystal habit, luster, fluorescence and softness. Uranopilite notably occurs at several localities including England, Canada, some areas in USA and the Bohemian region of Europe.



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Wednesday, September 30th, 2009 at 3:41 am
Category:
The Sulfates Mineral Class
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