Feldspar quarry in pegmatite. Most of the rare earth elements were discovered in gadolinite from Ytterby. Has given name to Ytterbium, Yttrium, Terbium, Erbium. Other elements discovered here: Gadolinium, Holmium, Thulium, Scandium, Lutetium, Tantalum.
Ref.:
- Mason, B. (1971). "Ytterby, Sweden: a classic mineral locality." Mineralogical Record, 2(3),pp:136-138.
- Kjellman et al. (1999) Canadian Mineralogist: 37: 832-833.
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Map Reference: 59°25'36"N , 18°21'12"E
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