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Shomiokite-(Y) & Adamsite-(Y)

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CFL1160119

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystal Group/Cluster
Size Range: 
Micromount (under 1cm)
Size: 
0.9 × 0.6 × 0.4 cm
Description

Rare floater specimen of a complete shomiokite-(Y) crystal associated with type locality adamsite-(Y) and orange crystals of possibly rhodochrosite.  Collected by Gilles Haineault in 1999.  Ex-Gilles Haineault collection specimen.

Mineral Data
What's on the rock

Shomiokite-(Y)

Formula: 
Na3Y[CO3]3·3H2O
Strunz: 
5.CC.20
Hardness: 
2.0 - 3.0
Streak: 
white
Type Locality: 
Shomiokitovoe pegmatite, Umbozero mine (Umbozerskii mine; Umba Mine), Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

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

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