Some methods of obtaining niobium and tantalum and their usage
Author(s)/Corporate Author (s)United Nations. Economic and Social Council;
United Nations. Economic Commission for Africa;
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This paper talks about Rapid increase of production of rare metals including niobium and tantalum used in most important field of modern engineering is essential for technical progress. Constant and ever-growing interest to these metals is aroused byfavourable combination of their properties making them in some cases indispensable.