2. Natural resources
Similar in chemistry, tantalum and niobium occur naturally together in the same ores. However, there are pyrochlore niobium deposits where tantalum is practically absent.
2.1 Minerals
Tantalum, less abundant than niobium, is dispersed in numerous ores.
World reserves stand at 36,400 t Ta content, half in Australia, and resources at 287,000 t Ta content
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Natural resources
Extractive metallurgy
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