CLASSIFICATION OF MINERALS. 



793 



Group 9. The vitriols. 

 a. Orthorhombic section. 



Davite. 

 Tekticite. 



Rubrite. 

 Amarantite. 



Hohmanuite. 

 Castauite. 

 Fibroferrite. 

 Aluiiiinite. 



Werthemannite. 



Winebergite. 

 Plauoferrite. 

 Raimoudite. 



Pastreite. 



Group 12. 



Fe(0H)S0,.H.20. 

 Fe(OH)S04.3H.20. 



Fe(0H)S04.4H20. 

 Fe(OH)S04.5H.O. 

 Al2(OH)4S04.7H.20. 



Fe2(OH)4S04.13H,0. 

 Fe4(0H)B(S04)3.4H.20. 



(?) 

 Triclinic. 



Monoclinic. 

 Monoclinic (i 

 Monoclinic. 



Orthorhombic (?). 

 Hexagonal. 



