Home Riebeckite
VIII - Inosilicates (Amphibole Group)
Crystal habit of Riebeckite

Name   Riebeckite
Chemistry   Na2Fe2+Fe3+2[(OH,F)|Si4O11]2
Hardness   5.5 - 6
Lustre   vitreous
Colour   blue, black, dark green
Streak   greenish brown 
Density [g/cm3]   3.4
Crystal habit   monoclinic, crystals rarely
Cleavage, Fracture   [110] perfect (124°)
other characteristics and occurrences   crocidolite = fibrous, asbestos form
in magmatic, acid, alkali rich rocks as well as in metamorphic rocks

This page in German - Diese Seite in Deutsch
© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
These recommendations are believed to be correct. However, no guarantee of their accuracy is given. Therefore, purchasers shall make their own tests to determine suitability for their use. These products are offered for industrial and related uses (e.g. research and development) only. However the user must take the necessary precautions appropriate for products containing chemicals. This description does not imply the absence of any patents, the responsibility whatsoever solely rests with the user.