Ammineite is the first recognized mineral containing ammine groups.

It was found in a guano deposit in Chile.

[2][3] At the same site other ammine-containing minerals were later found:[4][5][6][7] The characteristic features of the structure of ammineite are:[2] Ammineite coexists with atacamite, darapskite, halite and salammoniac.

[2] Ammineite is supposed to be a result of an interaction of an earlier copper mineral, likely from a plutonic rock, with ammonia in guano.

Ammonia may be produced in decomposition of compounds like urea or uric acid.