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Sodalite
Sodalite Group
Formule chimique :
Na8Al6Si6O24Cl2
Système cristallin :
Cubic
Etymologie :
because of its chemical composition which contains sodium, hence Soda in Latin which means soda and Lithos which means stone in Greek
Dureté :
5.5 – 6
Densité :
2.1 – 2.4
Propriétés physiques :
Vitreous to greasy luster, colour: colorless to dark blue, may be greenish and reddish, colorless trace, transparent to translucent, poor cleavage
Propriétés chimiques :
Soluble in acids
Formule chimique :
Na8Al6Si6O24Cl2
Habitus :
Often in massive clusters and more rarely in the form of dodecahedrons
Gîtologie :
Sodalite is always associated with silica-undersaturated and alkaline-rich magmatic rocks.
Determination :
Difficult
Utilisation :
No major use
The finest sodalite comes from Ontario, Canada, and Afghanistan, as well as from Minas Gerais, Brazil. In France, sodalite has been described in the Hautes-Pyrénées and in the Cantal.
(1 votes, average: 7.00 out of 10)
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