Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2010-R.Weller
 

 

Mineral Information on:
pyrochlore

Chemical Group:  niobate

Chemical Formula:
 
(Na,Ca)2Nb2O6(OH,F)    sometimes radioactive!

Color:     black to brown, chocolate brown, reddish brown, amber orange red-orange

Streak:  white

 

Hardness:   5 to 5.5              Specific Gravity:    4.45 to 4.90            

Luster: vitreous, resinous                  Tenacity:  brittle

Cleavage:

 

Crystal Forms:  Isometric system, octahedrons

Habits: octahedra crystals, granular, massive

Mineral Associations:

Identifying Characteristics:

Uses:  niobium ore

Occurrences:  Brazil, Canada, Uganda

Toxicity:      when-swallowed-                            when inhaled-

Additional Information: