polymignyte

Noun. (mineralogy) A mineral consisting of columbate (a compound containing the element niobium) and oxides of the cerium group of elements with iron and calcium.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.