bismutocolumbite

== English == === Etymology === From bismuto- +‎ columbite. === Noun === bismutocolumbite (uncountable) (mineralogy) An orthorhombic-dipyramidal black mineral containing bismuth, niobium, oxygen, and tantalum. ==== References ==== David Barthelmy (1997–2026), “Bismutocolumbite”, in Webmineral Mineralogy Database.