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Formula: (Na,Ca,K)1-x(Mg,Fe2+,Mn)PO4
Phosphate, manganese-bearing mineral
Crystal System: Monoclinic
Specific gravity: 2.9 measured, 2.99 calculated
Colour: Pale amber-yellow
Solubility: Insoluble in water
Environments
Localities
At the type locality, the Dayton meteorite, Montgomery County, Ohio, USA, panethite is
a very rare mineral in phosphate nodules in the
iron meteorite. Associated minerals include
brianite, whitlockite,
albite, enstatite,
schreibersite,
kamacite, taenite,
graphite, sphalerite
and troilite
(HOM, Mindat).
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