columbite-tantalite columbite • columbium · · · Info · Definitions · Synonyms · Characters · · columbite-tantalite · · Text Common · · Latin · · Scripts 19 · · Length 7 · · Syllables Definitions · · · (noun) a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips. Synonyms: coltan. · · Noun Definition 1 Synonyms · · · coltan · · Synonym 1 Characters · · - hyphen-minus U+002D a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 u latin small letter u U+0075