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Gadolinite-(Y)

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MNR122555

Gadolinite-(Y)

Radioactive

Description Tabs

Description
Locality: 
South Platte Pegmatite, Jefferson County, Colorado, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 3.8 × 2.3 cm
Description

Black grains of yttrian gadolinite in pegmatite matrix. Rare mineral.

Mineral Data
What's on the rock

Gadolinite-(Y)

Formula: 
Y2Fe2+Be2Si2O10
Strunz: 
9.AJ.20
Crystal System: 
Monoclinic
Hardness: 
6.5 - 7.0
Type Locality: 
Ytterby, Resarö, Vaxholm, Uppland, Sweden