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Formula: (NH4)2(PO3OH)
Anhydrous acid phosphate
Crystal System: Monoclinic
Specific gravity: 1.62 measured, 1.61 caalculated
Hardness: 1
Streak: White
Colour: White
Environments
Phosphammite is found in guano deposits, and is probably a crystallisation product of the liquid fraction of
guano
(Webmin, HOM).
Localities
At the type locality, Earles Find, Lake Rason, Laverton Shire, Western Australia, phosphammite is associated
with ammonian aphthitalite, urea and
weddellite
(HOM, Dana).
At the Guañape Islands, Virù Province, La Libertad, Peru, phosphammite is found with
biphosphammite
(HOM, Dana).
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