Kahlerite - Encyclopedia
Class : Phosphates, arsenates, vanadates
Subclass : Uranyl arsenates
Crystal system : Tetragonal
Chemistry : Fe(UO2)2(AsO4)2 12H2O
Rarity : Very rare
Kahlerite is a secondary arsenate of uranium and iron from the oxidation zone of uranium deposits and uranium iron deposits. It was named in honor of Franz Kahler, geologist at the Carinthian Landesmuseum (Austria). Kahlerite usually forms fine greenish yellow to lemon yellow tablets, 2 mm maximum.
Main photo : Kahlerite from Knichte section, Lölling, Austria © Stephan Wolfsried
Kahlerite in the World
Twinning
No twin known for this mineral species.
Fakes and treatments
No fakes recorded for this mineral species.
Hardness : 2 to 2.5
Density : 3.22
Fracture : Undetermined
Streak : Undetermined
TP : Translucent to transparent
RI : 1.632 to 1.634
Birefringence : 0.002
Optical character : Uniaxial -
Pleochroism : None
Fluorescence : None
Solubility : -
Magnetism : NoneRadioactivity : Strong