Home Vermiculite
VIII - Phyllosilicates		 Crystal habit of Vermiculite
 
Name   Vermiculite
Chemistry   (Mg,Fe3+,Al)3[(OH)2|AlSi3O10]·Mg0,33(H2O)4
Hardness   2.5
Lustre   pearly
Colour   brownish
Streak   white
Density [g/cm3]   2.3
Crystal habit   monoclinic, crystals tabular
Cleavage, Fracture   [001] perfect
other characteristics and occurrences   hydrothermal formation from biotite (K(Mg,Fe2+)3[(OH,F)2|(Al,Fe3+)Si3O10]) and phlogopite (KMg3[(OH,F)2|AlSi3O10])
   
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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