Strunzite Locality: Hagendorf South Pegmatite (Cornelia Mine; Hagendorf South Open Cut), Hagendorf , Waidhaus , Vohenstrauß , Oberpfälzer Wald , Upper Palatinate , Bavaria , Germany ( Locality at mindat.org ) Picture width 7 mm. Collection and photograph Christian Rewitzer — Photo: Christian Rewitzer · CC BY-SA 3.0
Strunzite
A pale-yellow hydrated manganese-iron phosphate — namesake of the strunzite group — forming fibrous coatings on pegmatite phosphates.
Intro adapted from Wikipedia (CC BY-SA).
Strunzite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Mn²⁺Fe³⁺₂(PO₄)₂(OH)₂·6H₂O.
It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Strunzite structural group.
Key properties: specific gravity 2.52; Vitreous luster; optically biaxial.
IMA symbol Snz, grandfathered status — known before the IMA’s founding, named in 1958.
A secondary mineral, typically altered from triphylite, in zoned complex granite pegmatites.
It is found associated with Triphylite, laueite, rockbridgeite, many other Mn–Fe phosphates.
The mineral was named to honor Dr. Hugo Strunz (1910–), Professor of Mineralogy, Technical University, Berlin, Germany, for his work on pegmatite phosphate minerals, especially those of Hagendorf.