Mining industry of Burundi

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1	COLUMBIUM (NIOBIUM) AND TANTALUM By Larry D. Cunningham Domestic survey data and tables were prepared by Robin C. Kaiser, statistical assistant, and the world production table was prepared by Regina R. Coleman, internati Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 2006-08-15 09:06:27 Refractory metals Transition metals Oxide minerals Niobium Tantalum Coltan Cabot Corporation Pyrochlore Mining industry of Burundi Chemistry Matter Chemical elements
2	COLUMBIUM (NIOBIUM) AND TANTALUM By Larry D. Cunningham Columbium (niobium—Nb) is vital as an alloying element in steels and in superalloys for aircraft turbine engines and is in greatest demand in industrialized count Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 1996-11-07 09:53:46 Refractory metals Transition metals Periodic table Tantalum Niobium Oxide minerals Coltan Cabot Corporation Mining industry of Burundi Chemistry Matter Chemical elements
3	PDF Document Add to Reading List Source URL: minerals.usgs.gov Language: English - Date: 1996-08-28 13:38:17 Refractory metals Transition metals Niobium Tantalum Coltan Cabot Corporation Ore Superalloy Mining industry of Burundi Chemistry Matter Chemical elements