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The chemical formula of mineral Cuproadamite is indicated by (Cu, Zn)2(AsO4)(OH) or Copper Zinc Arsenate Hydroxide. Cuproadamite is actually a Phosphate mineral. The name of the mineral species Cuproadamite is derived from the Latin word cuprum, which means copper and from the name of its close cousin Adamite. This is actually relative to its high copper content and some identical properties with mineral Adamite. Cuproadamite is known to crystallize in the orthorhombic system. In optical mineralogy, this orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths.

 

            Cuproadamite is commonly used as a mineral specimen and it usually exhibits a wonderful and interesting microscope images when viewed under petrographic polarizing light microscopes used in optical mineralogy. Most of the time, mineral Adamite and Cuproadamite are considered as not separate minerals. But Cuproadamite mineral name has been widely known even though it has yet to be acknowledged officially as a separate mineral from Adamite. Cuproadamite mineral contains a sufficient amount of copper in its chemical composition. And it commonly exhibits a very attractive reddish purple color to amethyst purple when viewed with the aid of polarizing light microscope for geologists.

 

            Mineral Cuproadamite is commonly found typically in a reddish purple color when evaluated under polarizing light microscopes. But it can be also found exhibiting purple, red or even green color under polarized microscopes. Cuproadamite usually exhibits a high adamantine luster in reflected light of polarizing microscope for geologists. Mineral Cuproadamite commonly shows a perfect cleavage in one direction when it is viewed closely between crossed nicols of petrographic polarizing microscope used in optical mineralogy. Cuproadamite also shows conchoidal fracture when it is evaluated under several adjustments on the aperture diaphragm of the polarized light microscopes foe mineralogists. The specific gravity measure of mineral Cuproadamite usually gives an approximate value of 4.6 grams per cubic centimeters, which is considered heavy for translucent minerals and slightly heavier than adamite. The hardness measure of the mineral Cuproadamite when it is evaluated using the Mohs scale method is usually 3.5. Cuproadamite is most commonly found leaving a white streak when the specimen is rubbed on a white porcelain streak plate. 

 

            Most Cuproadamite crystals are found transparent to translucent in appearance. The crystal habits of the mineral Cuproadamite as described in optical mineralogy commonly include diamond shaped and wedge like prisms that are sometimes modified with minor prismatic faces and are commonly terminated by a double triangle. This habit can be seen clearly exhibited with the aid of petrographic polarizing light microscopes. Cuproadamite crystals can be also found in druses and radiating clusters, which commonly form wheel and wheat sheath shapes that usually appear very interesting when viewed with the aid of polarizing microscopes for mineralogists or the ones used in optical mineralogy. Mineral Cuproadamite is rarely found forming a perfectly smooth botryoidal habit like smithsonite. But it is commonly found having well formed crystal terminations that usually sparkle on top of the subbotryoidal surface of the crystal, which can be clearly exhibited when it is evaluated with the aid of petrographic polarizing light microscopes. Cuproadamite does not fluoresce in either short wave or long wave ultra violet light. It has been noted that the copper content acts as the poison or deactivator of the fluorescence property of the mineral.

 

            Mineral Cuproadamite is commonly associated with several other interesting minerals like limonite, smithsonite, adamite, conichalcite, calcite, aragonite and other oxidation zone minerals. The best field indicators of mineral Cuproadamite usually include density, crystal habit, color, nonfluorescence and its wonderful association with other interesting minerals. Mineral Cuproadamite commonly occurs in the oxidized or weathered zones of above zinc ore occurrences. Mineral Cuproadamite notably occurs at some famous mineral localities like the famous mines at Mapimi in Mexico and some other sites, which contain adamite and many other copper minerals. Cuproadamite can be also found in Greece. 



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Thursday, August 28th, 2008 at 3:21 am
Category:
The Phosphates Mineral Class
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