Goethite
H
1
Fe
1
O
2
  
 
Minerals with the same name may vary widely in appearance and composition, and very few are >99% (reagent grade) pure.

Gram formula weight (molecular mass) = 88.853


Minerals may vary in elemental composition and impurity levels.
Wikipedia Page:

Goethite
is defined with respect to the entities below:
The entities below are defined with respect to:
Goethite
Mineral (generic)


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