Kingsmountite

kingsmountite

mitridatite

birnessite

mangangordonite

Images

Formula: Ca4Fe2+Al4(PO4)6(OH)4.12H2O
Hydrated phosphate containing hydroxyl, montgomeryite group
Specific gravity: 2.51
Hardness: 2½
Streak: White
Colour: Colourless to white, may have a light tan to pale brown tinge
Environments

Pegmatites
Hydrothermal environments

Kingsmountite is a secondary mineral formed by the oxidation of primary phosphates by descending oxidising ground water in complex granite pegmatites (Webmin, HOM).

Localities

At Vasin-Myl'k Mt, Voron'i Tundry, Murmansk Oblast, Russia, kingsmountite is associated with eosphorite, laueite, lun'okite, fairfieldite and mitridatite (HOM).

At the type locality, the Foote Lithium Company Mine, Kings Mountain Mining District, Cleveland county, North Carolina, USA, kingsmountite occurs in phosphate mineralised fractures in granite pegmatite, associated with mitridatite, mangangordonite, birnessite and albite (Mindat, Dana, HOM).

At the Tip Top mine, South Dakota, USA, kingsmountite is associated with whitlockite and cyrilovite (HOM).

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