gadolinite

Noun. (mineralogy) A dark, vitreous mineral that is a complex mixture of silicates of cerium, lanthanum, neodymium, yttrium, beryllium, and iron, with the chemical formula (Ce,La,Nd,Y)₂Fe Be₂Si₂O₁₀.

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