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Gadolinite-(Y) (TL) - Ytterby, Resarö, Vaxholm, ,Uppland, Sweden
(#:MINS7950)
Historical specimen with Gadolinite xls up to 1,2 cm from the type locality. Gadolinite is a rare yttrium, beryllium silicate found in granites and alkalic granitic pegmatites.
Formula :
Y
2
Fe
2+
Be
2
[O/SiO
4
]
2
System:
monoclinic
Hardness:
6˝-7
Rarity:
not common
Strunz id:VIII/B.29-50 - SILICATES
Name origin:
Named after J. Gadolin (1760-1852), discoverer of yttrium and the "-(Y)" suffix due to the dominance of yttrium in the composition
Specimen weight:26 gr.
Crystal size:Up to 2,2 cm wide
Overall size: 38mm x 32 mm x 16 mm
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