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Adamsite-(Y) & Fluorthalénite-(Y) & Allanite-(Y)

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Adamsite-(Y) & Fluorthalénite-(Y) & Allanite-(Y)

Description Tabs

Description
Locality: 
Stetind Pegmatite, Tysfjord, Nordland, Norway
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 4 × 1.8 cm
Description

Adamsite y, fluorthalenite y and allanite y in matrix

Mineral Data
What's on the rock

Adamsite-(Y)

Formula: 
NaY[CO3]2·6H2O
Strunz: 
5.CC.30
Crystal System: 
Triclinic
Hardness: 
3.0
Streak: 
White
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Allanite-(Y)

Formula: 
{CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05b
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.5
Colour: 
Black