2). Bismuth is mainly found in the ores bismuthinite (bismuth sulfide) and bismite (bismuth oxide), but also occurs in its elemental state, in the form of crystals with an oxide layer of varying ...

Kyawthuite is a bismuth-antimony oxide, with the chemical formula Bi₃⁺Sb₅⁺O₄, with traces of tantalum. These elements, though not exceedingly rare individually, formed under unique ...