Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Rutile concentrate produced by the Indian Rare Earths Limited from Kerala beach sands analyses 1.5% Nb2O5 and 0.13% Ta2O5. Incident light microscopy and scanning electron microscopy have revealed that niobium and tantalum are camouflaging Ti in this rutile. Exsolved acicular inclusions of tapiolite are observed in a few grains. Preliminary experiments to obtain Nb-Ta rich fraction from this rutile by physical methods have not given encouraging results, but it is observed that these elements get relatively enriched in the residual titanium dust, which accumulates as a waste product in the titanium pilot plant at Nuclear Fuel Complex, Hyderabad. Concentrates containing up to 31% Nb2O5 and 3.8% Ta2O5 could be obtained from this residual dust after elimination of carbon.
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