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Formula: Mn2+(UO2)2(PO4)2.8H2O
Hydrated phosphate, uranyl mineral,
meta-autunite group,
manganese-bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.50 measured, 3.674 calculated
Hardness: 2 to 3
Streak: White
Colour: Bronze yellow, honey yellow
Environments
Lehnerite is a very rare uranium-bearing phosphate.
Localities
At the type locality, the Hagendorf South Pegmatite, Waidhaus, Neustadt an der Waldnaab, Upper Palatinate, Bavaria,
Germany,
lehnerite is a secondary mineral in the oxidised zone
of the complex granite
pegmatite, associated with decomposed
zwieselite and strongly corroded
rockbridgeite
(HOM, Dana, AM 75.1433).
In the same paragenesis fluellite,
carlhintzeite,
morinite and pachnolite occur
(AM 75.1433).
Lehnerite from the Hagendorf South Pegmatite -
Image
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