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The chemical formula of mineral Otavite is indicated by CdCO3 or Cadmium Carbonate. This Otavite is actually a Carbonate mineral. Otavite is most commonly used as mineral specimen and it is often found exhibiting nice images when viewed under petrographic polarizing microscopes. Otavite is also considered as a minor ore of cadmium. Otavite is one of the rare minerals from the famous mines of Tsumeb, Namibia. Otavite was actually named after its type of locality at Tsumeb, Otavi, Namibia.

 

            Otavite is usually found white, but it can also appear yellowish brown, reddish brown and brown at some time ad could also exhibit interesting images when viewed with the aid of polarized microscopes for mineralogists. Otavite is most commonly found showing adamantine to pearly luster when viewed in reflected light of geological polarizing light microscope used in optical mineralogy. Most Otavite crystals are usually translucent to transparent in appearance. Otavite is known to crystallize in the trigonal system of crystal formation. The crystal habit of the mineral Otavite as described in the field of optical mineralogy is limited only to crusts and tiny scalahedral crystals.

 

            Otavite is also usually found showing perfect cleavage in 3 non-perpendicular directions forming rhombs. It is also most commonly found showing conchoidal fracture when viewed under polarizing microscope used in optical mineralogy. The hardness measure of Otavite when it is evaluated using the Mohs scale method is usually ranging from 3.5 to 4. Otavite is most commonly found leaving a white streak when rubbed on a white porcelain streak plate. The specific gravity measure of the mineral is usually found 5 grams per cubic centimeters, which is very heavy for a translucent mineral. Otavite is also known to effervesce with acid and some specimens have fluoresced red under shortwave ultraviolet light. The best field indicators of Otavite include reaction to acids, locality, density, color, and cleavage. Otavite is also most commonly found associated with other interesting minerals including azurite, calcite, smithsonite, and malachite. Otavite notably occurs at its type of locality at Tsumeb, Namibia and also at some mines in USA and Australia.



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Friday, May 15th, 2009 at 3:23 am
Category:
The Carbonates and Borates Mineral Class
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