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The chemical formula of mineral Paravauxite is indicated by FeAl2(PO4)2(OH)2 – 8H2O or Hydrated Iron Aluminum Phosphate Hydroxide. Paravauxite is actually a Phosphate mineral. It is most commonly used as mineral specimen and is most often found exhibiting nice and splendid images when viewed under petrographic polarizing microscope used in optical mineralogy. Paravauxite is also closely related to its basic namesake vauxite. It has been known in optical mineralogy that Paravauxite differs only in vauxite in the number of water molecules in their structure. The presence of these water molecules in Paravauxite can alter the structure of the mineral to the point that it forms perfect cleavage while in sharp contrast. In optical mineralogy, cleavage is defined as one property of minerals that is undeniably tied to the structure of a mineral. Paravauxite is also showing a striking green to colorless color that could be more fascinating when viewed under polarized microscopes for mineralogists.

             Paravauxite is also dimorphous with mineral metavauxite. In optical mineralogy, a dimorph is a mineral that has the same chemistry but of different structure with the other mineral. Paravauxite is most commonly found colorless, white or pale green in color that could appear more splendidly wonderful when viewed under polarizing light microscopes used in optical mineralogy. Paravauxite is also usually found showing vitreous to pearly luster when viewed in reflected light of petrographic polarizing microscope for mineralogists. Most specimens of Paravauxite are found translucent to transparent in appearance.  

            The crystal habit of mineral Paravauxite as described in the field of optical mineralogy usually include tabular crystals and radiating fibrous masses that could appear more interesting when viewed under polarized microscope for mineralogists. Mineral Paravauxite is also known to crystallize in the triclinic system of crystal formation. In optical mineralogy, this triclinic crystal system commonly comprises crystals having three axes, of which all are unequal in length and are positioned oblique to one another. Mineral Paravauxite is also usually found showing perfect cleavage when viewed under petrographic polarizing microscopes used in optical mineralogy. Paravauxite also exhibits conchoidal fracture when specimen sample is closely evaluated under polarizing microscope for mineralogists. The hardness measure of the mineral Paravauxite when it is evaluated using the Mohs scale method is usually 3. The specific gravity measure of mineral Paravauxite is approximately 2.4 grams per cubic centimeters, which is considered average value. Mineral Paravauxite is also most commonly found leaving a white streak when specimen is rubbed on a white porcelain streak plate. The best field indicators of mineral Paravauxite usually include color, perfect cleavage, crystal habit, locality and association. Paravauxite is usually found associated with other interesting minerals including cassiterite, limonite, quartz, wavellite, vauxite and metavauxite. Paravauxite is most commonly found at the famous tin oxide deposits at Llallagua, Potosi, Bolivia and a few minor localities around the world.



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Monday, June 29th, 2009 at 2:25 pm
Category:
The Phosphates Mineral Class
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