Hagendorfite - Encyclopedia
Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Monoclinic
Chemistry : NaCaMn(Fe,Mg)2(PO4)3
Rarity : Very rare
Hagendorfite is a very rare primary phosphate found in complex granitic pegmatites and in phosphate nodules of schists. It forms a series with varulite. It owes its name to its discovery location : the pegmatites of Hagendorf (Germany). Hagendorfite forms masses or small greenish-black crystals of 4 mm at most. It is associated with triphyllite, wolfeite and hematite.
Main photo : Hagendorfite from Siglo Veinte Mine, Llallagua, Potosí, Bolivia © Rob Lavinsky
Hagendorfite in the World
Twinning
No twin known for this mineral species.
Fakes and treatments
No fakes recorded for this mineral species.
Hardness : 3.5
Density : 3.71
Fracture : Irregular
Streak : Black to dark green
TP : Translucent
RI : 1.708 to 1.745
Birefringence : 0.014
Optical character : Biaxial -
Pleochroism : Strong
Fluorescence : None
Solubility : -
Magnetism : NoneRadioactivity : None