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Columbite:
Chemical Formula: (Fe, Mn, Mg)(Nb, Ta)2O6 .
Chemical Name: Iron Manganese Magnesium Niobium Tantalum Oxide.
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Answered
Columbite:
Chemical Formula: (Fe, Mn, Mg)(Nb, Ta)2O6 .
Chemical Name: Iron Manganese Magnesium Niobium Tantalum Oxide.