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The chemical formula of mineral Calciovolborthite is indicated by CaCuVO4(OH) or Calcium Copper Vanadate Hydroxide. Calciovolborthite is actually a Phosphate mineral. Calciovolborthite 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. Calciovolborthite is commonly considered as a rare vanadate mineral specimen. Calciovolborthite is also most commonly found forming a solid solution series with another interesting mineral called conichalcite. In optical mineralogy, when two or more minerals that are found structurally identical and have the capability to interchange elements within their chemistries without actually dramatically altering the crystal structure, a solid solution series occurs. Two elements that interchanged in this case of conichalcite and Calciovolborthite are arsenic and vanadium. The arsenic rich end member of the solid solution series is the conichalcite. While the vanadium rich end member is the Calciovolborthite.

 

            Calciovolborthite is most commonly found in shades of green in both transmitted and reflected light of petrographic polarizing microscope used in optical mineralogy. Calciovolborthite specimen is most commonly found exhibiting a vitreous, pearly or dull luster when it is closely viewed in reflected light of petrographic polarizing microscopes for mineralogists. Calciovolborthite commonly appears vitreous or pearly on cleavage surfaces when specimen is closely viewed under polarized microscope used in optical mineralogy. Calciovolborthite is most commonly found with absent cleavage even when mineral specimen is evaluated between crossed nicols of petrographic polarizing light microscope used in optical mineralogy. Calciovolborthite also shows uneven fracture when it is evaluated under several adjustments on the aperture diaphragm of polarizing light microscope for mineralogists. The specific gravity of mineral Calciovolborthite usually gives an approximate value of 3.8 grams per cubic centimeters, which is commonly heavy for non-metallic minerals.The hardness measure of mineral specimen Calciovolborthite when it is examined using the Mohs scale method is commonly found ranging from 3 to 4. Calciovolborthite is most commonly found leaving a pale green to gray streak when mineral specimens are rubbed on a white streak plate.

 

            Calciovolborthite minerals are commonly found transparent to opaque in appearance. The crystal habit of Calciovolborthite mineral as described in optical mineralogy usually includes druzy crusts, which are really interesting to view under polarizing light microscope for geologists. They can be also found as masses. Sometimes Calciovolborthite minerals are found in scaly aggregates and also in fibrous form that is usually interesting to view under polarized microscopes. Calciovolborthite mineral specimen may fluoresce under ultraviolet light. Calciovolborthite mineral commonly forms as a secondary mineral in vanadium bearing sandstone deposits. The best field indicators of mineral specimen Calciovolborthite usually include color, density, locality and if present, the fluorescence property. Mineral Calciovolborthite notably occurs at a type of locality like Germany.



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Monday, February 16th, 2009 at 2:42 am
Category:
The Phosphates Mineral Class
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