Orange crystals of the extremely rare mineral flurlite from the type and only known locality worldwide in Hagendorf South (Hagendorf South Pegmatite, Bavaria, Germany). Ex Vandenbroucke Museum collection specimen, from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Flurlite
Flurlite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Zn²⁺Zn²⁺₃Fe³⁺(PO₄)₃(OH)₂(H₂O)₇·2H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Flurlite structural group.
Key properties: specific gravity 2.89; Buff streak; Pearly luster; optically biaxial.
IMA symbol Flu, IMA status: approved, named in 2014.
A secondary mineral probably formed from the hydrothermal reaction of zinc-bearing fluids with primary Fe-Mn phosphate minerals (triphylite or zwieselite).
It is found associated with Mitridatite, plimerite, beraunite, schoonerite, parascholzite, robertsite.
The mineral was named to honor Mathias von Flurl (1756-1823), the founder of mineralogical and geological studies in Bavaria and author of the first geological map of Bavaria.