Power Thesaurus. 1969. pedometer thesaurus http://www.powerthesaurus.org/pedometer/synonyms (accessed August 31, 2017). Harvard. Power Thesaurus 1969, pedometer thesaurus, Power Thesaurus, viewed 31 August, 2017, <http://www.powerthesaurus.org/pedometer/synonyms>.
We would like to Buy Columbite with Nb2O5 45-55% min,Ta2O5 approx 5%, U3O8+ThO2 0.5% max. Niobium metal ingots 99.95%min.
Its main use today is in tantalum capacitors in electronic equipment such as mobile phones, DVD players, video game systems and computers. Tantalum, always together with the chemically similar niobium, occurs in the minerals tantalite, columbite and coltan (a mix of columbite and tantalite).