gadolinite
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gad·o·lin·ite
(găd′l-ə-nīt′)n.
A dark green or greenish-black silicate mineral, Be2FeY2Si2O10, containing several of the rare-earth elements in combination with iron.
[After Johan Gadolin (1760-1852), Finnish chemist.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
gadolinite
(ˈɡædəlɪˌnaɪt)n
(Minerals) a rare brown or black mineral consisting of a silicate of iron, beryllium, and yttrium in monoclinic crystalline form. Formula: 2BeO.FeO.Y2O3.2SiO2. Also called: ytterbite
[C19: named after Johan Gadolin (1760–1852), Finnish mineralogist]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
gad•o•lin•ite
(ˈgæd l əˌnaɪt)n.
a silicate mineral from which the rare-earth metals gadolinium, holmium, and rhenium are extracted.
[1795–1805; after J. Gadolin (1760–1852), Finnish chemist; see -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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| Noun | 1. |  gadolinite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbiumatomic number 4, Be, beryllium, glucinium - a light strong brittle grey toxic bivalent metallic element atomic number 58, Ce, cerium - a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group atomic number 68, Er, erbium - a trivalent metallic element of the rare earth group; occurs with yttrium atomic number 64, gadolinium, Gd - a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group atomic number 67, Ho, holmium - a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds atomic number 65, Tb, terbium - a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite atomic number 70, Yb, ytterbium - a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime atomic number 39, Y, yttrium - a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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