Formula: NaAl3(PO4)2(OH)4.2H2O
Hydrated phosphate with hydroxyl, wardite group
Specific gravity: 2.81 to 2.87
Hardness: 5
Streak: White
Colour: Colourless, white, lightly coloured blue to green, yellow-green, light yellow, brown, colourless in transmitted light
Solubility: Completely soluble in acids with difficulty

Sedimentary environments
Metamorphic environments

Wardite is an alteration product of amblygonite in pegmatites and it also occurs in low temperature phosphatic nodules in sedimentary rocks.


At Tom's quarry, Kapunda, Mount Lofty ranges, South Australia, wardite is associated with leucophosphite, mitridatite, natrodufrénite and kapundaite (AJM 17.1.27).

At the Mount Deverell variscite deposit, Milgun Station, Western Australia, wardite generally occurs at the margins of variscite veins, associated with millisite in some cases. It may also be replaced by crandallite. The variscite deposits are hosted by marine sedimentary rocks (AJM 20.2.33).

At Montebras, Creuse, France, wardite is an alteration product of amblygonite (Dana).

At the type locality, Clay Canyon, Utah, USA, wardite is associated with millisite and crandallite.

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