Formula: Cu2Al(AsO4)(OH)4.4H2O
Hydrated arsenate containing hydroxyl
Crystal System: Monoclinic
Specific gravity: 2.94 to 3.01 measured, 3.03 calculated
Hardness: 2 to 2½
Streak: Light blue
Colour: Sky-blue to green
Solubility: Soluble in acids
Common impurities: P
Environment
Liroconite is a rare secondary mineral found in oxidised zones of
copper deposits,
associated with olivenite,
chalcophyllite, clinoclase,
cornwallite, strashimirite,
malachite, cuprite and
“limonite"
(HOM).
At Cerro Gordo mine, Inyo county, California, USA, liroconite occurs with linarite
and caledonite (Dana).
At the type locality, Wheal Gorland, Cornwall, England, liroconite occurs with
cornubite and cornwallite
(Dana).
At Wheal Unity, Cornwall, England liroconite has been found on cuprite associated
with malachite, azurite and
clinoclase
(AM 36.484).
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