Gadolinite meaning

găd'l-ə-nīt'
A dark green or greenish-black silicate mineral, Be2 FeY2 Si2 O10 , containing several of the rare earths in combination with iron.
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A dark green to black, hard, radioactive mineral, beryllium iron yttrium silicate, Be2FeY2Si2O10, that is an ore of various rare-earth elements.
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(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)2FeBe2Si2O10.
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Origin of gadolinite

After Johan Gadolin (1760–1852), Finnish chemist