Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2006-R.Weller
 

Mineral Information on:
pyrophyllite

Chemical Group:    silicate

Chemical Formula:    
Al2Si4O10(OH)2

Color:  white, pale yellow, reddish brown          Streak: white

Luster:  pearly on cleavage surface, greasy or dull

 

Hardness: 1 to 1.5          Specific Gravity: 2.84            

Cleavage:  perfect cleavage in one direction

 

Crystal Forms:  Monoclinic

Crystal Habit: commonly in radiating spherulite aggregates of small crystals

Mineral Associations:

Identifying Characteristics:

Uses:  Used in a similar manner to talc.  Also used as a carrier for insecticides

Occurrences: 

Toxicity:      when-swallowed-                            when inhaled-

Additional Information: