Calcium Tungstate ( CaWO4 )

Cassiterite Cassiterite Cassiterite
Crystal Properties    
Crystal growth method Natural  
Crystal orientation (001) (100) (110) (111) others on request  
Maximum size up to 10 x 10 mm  
Crystallographic properties a = 4,73 A C = 3,18 A  
Crystallographic structure tetragonal  
Twinning structure natural defects  
Colour dark yellow brownish  
Density 6,90 g/cm³  
Hardness 7,0