bis·muth·ite | \ˈbizməˌthīt, ˈbism-, -ˌt͟hīt\
plural -s

Definition of bismuthite 

: a nitrate of bismuth: such as

a : the normal nitrate Bi(NO3)3.5H2O obtained as colorless lustrous hygroscopic crystals by the action of nitric acid on bismuth and used chiefly in making other bismuth compounds

b : bismuth subnitrate

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History and Etymology for bismuthite

German bismutit, bismut bismuth + -it -ite

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