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Scolecite VIII - Tectosilicates (Zeolite Group)

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Name		Scolecite
Chemistry		Ca[Al2Si3O10]·3H2O
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		monoclinic, crystals prismatic, acicular
Cleavage, Fracture		[100] perfect, [010] imperfect, fracture conchoidal
other characteristics and occurrences		solid solution series scolecite = Ca-bearing (Ca[Al2Si3O10]·3H2O) natrolite = Na-bearing (Na2[Al2Si3O10]·2H2O) fibrous, radiating, massive, 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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