Strengite forms as an alteration product of primary phosphate minerals such as triphylite. Strengite will occur if the oxidation conditions are high enough to oxidize the iron of triphylite from a ferrous (+2) state to the ferric (+3) state as is needed for strengite.
Where is Strengite found?
Strengite from Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil.
What is the chemical formula of Strengite?
Strengite is a relatively rare iron phosphate mineral with the formula: FePO4 · 2H2O. The mineral is named after the German mineralogist Johann August Streng (1830–1897).
