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Formula: MgMn2+Al(PO4)2(OH).4H2O
Hydrated phosphate, overite group,
manganese-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 2.66 measured, 2.69 calculated
Hardness: 3 to 4
Streak: White
Colour: Colourless, white
Environments
Localities
At the type locality, Voron'i Tundry, Murmansk Oblast, Russia, lun'okite occurs as radiating aggregates, 0.5 to
1.0 mm, in fractures in granitic
pegmatites and on crusts of nodules of
mitridatite in fractures. Associated minerals include
eosphorite, laueite,
kingsmountite, fairfieldite and
mitridatite
(AM 69.210-211, HOM).
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