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Definition of Polymignyte
1. Noun. (minerology) A mineral consisting of columbate (a compound containing the element niobium) and oxides of the cerium group of elements with iron and calcium. ¹
¹ Source: wiktionary.com
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1. Noun. (minerology) A mineral consisting of columbate (a compound containing the element niobium) and oxides of the cerium group of elements with iron and calcium. ¹
¹ Source: wiktionary.com