Natrolite

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Natrolite

Description

A white, glassy zeolite mineral composed of hydrated sodium aluminosilicate. Natrolite was named by Heinrich Klaproth in 1803. The mineral occurs in France (Puy-deMarman), Italy (Brevino), Norway (Brevik), Ireland (Belfast), the Faroe Islands, and the U.S. (New Jersey, Montana, California). It was one of the first zeolite minerals to be used as a cation exchanger in water softeners.

Synonyms and Related Terms

fargite (red color)

Raman

NatroliteRS.jpg

Raman

Natroliteitaly1.jpg


Other Properties

Orthorhombic system with fibrous crystals or masses. Cleavage is perfect in one direction.

Fracture = uneven. Luster = vitreous to silky. Streak = colorless

Composition Na2(Al2Si3O10)2H2O
Mohs Hardness 5.0 - 5.5
Density 2.2-2.3

Additional Information

Mineralogy Database: Natrolite

Additional Images


Sources Checked for Data in Record

  • C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979