Oxyhalide, matlockite group, forms a series with daubréeite
Specific gravity: 7.36
Hardness: 2 to 2½
Colour: Cream-white, greyish, yellowish brown; colourless in thin section
Solubility: Totally soluble in acids. Re-precipitates upon considerable dilution.
Common impurities: Fe,OH
Bismoclite is formed by the oxidation of bismuth or
bismuthinite, usually under arid conditions
At Bygoo, New South Wales, Australia, bismoclite has been found in greisen, associated with bismuthinite (HOM, AM 28.536-540).
At the type locality, Jakkalswater, Steinkopf, Namakwa District, Northern Cape, South Africa, bismoclite has been found in an alluvial specimen, found near bismuth-bearing granite pegmatites, associated with mica and bismutite (Mindat, HOM).
Near Dalbeattie, Scotland, UK, bismoclite is associated with atacamite, connellite and uranium minerals (HOM).
At the Tintic District, Utah, USA, bismoclite is associated with bismutite, jarosite, alunite and cerussite (HOM, AM 28.536-540).
Back to Minerals