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Gadolinite
 | You can help expand this article with text translated from the corresponding article in German. (January 2024) Click [show] for important translation instructions.
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| Gadolinite | |
|---|---|
 Gadolinite (black portion at top) | |
| General | |
| Category | Nesosilicate |
| Formula (repeating unit) | (Ce,La,Nd,Y)2FeBe2Si2O10 |
| IMA symbol | Gad[1] |
| Strunz classification | 9.AJ.20 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | P21/n |
Gadolinite, sometimes known as ytterbite, is a silicate mineral consisting principally of the silicates of cerium, lanthanum, neodymium, yttrium, beryllium, and iron with the formula (Ce,La,Nd,Y)2FeBe2Si2O10. It is called gadolinite-(Ce) or gadolinite-(Y), depending on the prominent composing element (Y if yttrium predominates, and Ce if cerium). It may contain 35.5% yttria sub-group rare earths, 2.2% ceria earths, as much as to 11.6% BeO, and traces of thorium. It is found in Sweden, Norway, and the US (Texas and Colorado).
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
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