coltan - Wiktionary
coltan ( plural coltans ) A metallic ore, (Fe,Mn) (Ta,Nb) 2 O 6, from which the elements niobium and tantalum are extracted. quotations . Synonym: columbite-tantalite. Coltan is used for the production of tantalum capacitors. 2007, Elizabeth Grossman, High Tech Trash, Island Press ( →ISBN ), page 46: [ …] as of 2003 over one billion cell ...