Simple oxide, tetragonal paramorph of monoclinic bismite, bismuth-bearing mineral
Specific gravity: 7.17 calculated
Colour: Green, pale yellow, grey
Solubility: Soluble in 1:1 hydrochloric and nitric acids
Common impurities: As
There are two co-type localities, the Schmiedestollen dump, Wittichen, Schenkenzell, Rottweil, Freiburg Region, and Neubulach, Calw, Karlsruhe Region, both at Baden-Württemberg, Germany. Sphaerobismoite occurs as an oxidation product of wittichenite and emplectite, as crystals to 20 microns in size. Associated minerals include bismutite, mixite, malachite, baryte, quartz and limonite (HOM, Mindat).
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