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Villiaumite & Thermonatrite

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CFL790225

Villiaumite & Thermonatrite

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 2 × 1.5 cm
Description

Very nice single villiaumite crystal covered with thermonatrite.  The thermonatrite may be removed to uncover the villiaumite.  Collected by Gilles Haineault in 1990.

Mineral Data
What's on the rock

Villiaumite

Formula: 
NaF
Strunz: 
3.AA.20
Crystal System: 
Isometric
Hardness: 
2.0 - 2.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea

Thermonatrite

Formula: 
Na2CO3·H2O
Strunz: 
5.CB.05
Crystal System: 
Orthorhombic
Hardness: 
1.0 - 1.5

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