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Otavite is a rare cadmium carbonate mineral with the formula CdCO3. Otavite crystallizes in the trigonal system and forms encrustations and small scalenohedral crystals that have a pearly to adamantine luster. The color is white to reddish to yellow brown. Its Mohs hardness is 3.5 to 4 and the specific gravity is 5.04. Associated minerals include azurite, calcite, malachite, and smithsonite.

Otavite
Otavite-89481.jpg
Otavite, Tsumeb, Oshikoto Region, Namibia
General
CategoryCarbonate minerals
Formula
(repeating unit)
CdCO3
Strunz classification5.AB.05
Crystal systemTrigonal
Crystal classHexagonal scalenohedral (3m)
H-M symbol: (3 2/m)
Space groupR3c

It was first described in 1906 from the Tsumeb district near Otavi, Namibia.

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