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 ... radio-opaque nature, and bismuth ...

Pyrochlore: A type of crystal structure commonly found in certain oxides, characterized by a specific arrangement of cations and anions. Doping: The process of adding impurities to a semiconductor ...