Lehnerite 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 3 mm. Collection and photograph Christian Rewitzer — Photo: Christian Rewitzer · CC BY-SA 3.0
Lehnerite
Lehnerite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Mn²⁺(UO₂)₂(PO₄)₂·8H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1/n).
Key properties: Mohs hardness 2–3; specific gravity 3.5; Pale yellow streak; Vitreous to resinous luster; optically biaxial.
IMA symbol Lh, IMA status: approved, named in 1986.
A rare secondary mineral found in the oxidized zone of a complex granite pegmatite.
It is found associated with Zwieselite, rockbridgeite.
The mineral was named to honor Ferdinand Lehner (1868–1943), Pleystein, Germany, an early collector of Hagendorf minerals.