Home Natrolite
VIII - Tectosilicates (Zeolite Group)
Crystal habit of Natrolite Natrolite

Name   Natrolite
Chemistry   Na2[Al2Si3O10]·2H2O
Hardness   5 - 5.5
Lustre   vitreous - silky
Colour   white, colourless, grey white, yellowish white, reddish white
Streak   white
Density [g/cm3]   2.2 - 2.4
Crystal habit   orthorhombic, crystals prismatic, acicular
Cleavage, Fracture   [110] perfect, [010] imperfect, fracture conchoidal
other characteristics and occurrences   solid solution series
natrolite = Na-bearing (Na2[Al2Si3O10]·2H2O)
scolecite = Ca-bearing (Ca[Al2Si3O10]·3H2O)
fibrous, radiating, masive, in cavities of basalts, phonolites, syenites

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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