Characterization and alternative dissolution of tantalite ,
Know Morethe niobate-tantalate mineral columbite-tantalite (coltan), which normally contains mixtures of columbite and tantalite with up to 60% Nb content Columbite and tantalite are variations of the general formula (Fe,Mn)(Nb,Ta)2O6, and the mineral is called tantalite when the tantalum content exceeds the niobium content, and columbite (niobite)...
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