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Chkalovite & Ussingite

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SYM199506

Chkalovite & Ussingite

Rare Mineral

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Size Range: 
Micromount (under 1cm)
Size: 
0.7 × 0.9 × 0.6 cm
Description

Very tiny clear crystal of ckalovite on blocky ussingite crystals. The ussingite and ckalovite are exactly the same color however the ckalovite is more octogonal and has a brighter glitter.

Mineral Data
What's on the rock

Chkalovite

Formula: 
Na2BeSi2O6
Strunz: 
9.DM.20
Hardness: 
6.0
Colour: 
White
Type Locality: 
Malyi Punkaruaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

Ussingite

Formula: 
Na2AlSi3O8OH
Strunz: 
9.EH.20
Crystal System: 
Triclinic
Hardness: 
6.0 - 7.0
Streak: 
white
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland