Home Sillimanite
VIII - Nesosilicates		 Crystal habit of Sillimanite
 
Name   Sillimanite
Chemistry   Al[6]Al[5][O|SiO4] = Al2SiO5
Hardness   6 - 7
Lustre   vitreous
Colour   colourless, grey, grey green, yellowish grey
Streak   white 
Density [g/cm3]   3.2
Crystal habit   orthorhombic, no individual crystals
Cleavage, Fracture   [010] perfect, fracture uneven
other characteristics and occurrences   in metamorphic rocks of high temperature, wide spread occurrences, typical metamorphic mineral, polymorph (same chemistry, different structure) with andalusite and cyanite
   
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.