Home Arfvedsonite
VIII - Inosilicates (Amphibole Group)		 Crysta habit of Arfvedsonite
 
Name   Arfvedsonite
Chemistry   Na2,5Fe2+4Fe3+[(OH)|Si4O11]2
Hardness   5.5 - 6
Lustre   vitreous
Colour   greenish black, dark blue, grey
Streak   bluish grey 
Density [g/cm3]   3.1 - 3.5
Crystal habit   monoclinic, crystals prismatic, acicular, radiating, tabular
Cleavage, Fracture   [110] perfect (124°), fracture uneven to conchoidal
other characteristics and occurrences   in alkali rich plutonic rocks with high concentration of iron (nepheline-syenite) and pegmatites, rarely in metamorphic schists
   
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.