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Formula: Cu9(AsO4)2(SO4)(OH)10.7H2O
Compound arsenate
Crystal System: Orthorhombic
Specific gravity: 3.09 measured, 3.09 calculated
Hardness: 2
Streak: Pale green
Colour: Pale blue to green
Common impurities: P,C,Al
Environments:
Parnauite is a rare secondary mineral.
At Cap Garonne mine, France, parnauite is associated with cyanotrichite,
brochantite, lavendulan,
mansfieldite–scorodite,
chalcopyrite and cornubite
(HOM).
At the New cliffe Hill quarry, Stanton under Barton, Leicestershire, England, UK, parnauite has been found with
cuprite
(RES p197).
At the Gwaithyrafon mine, Wales, UK, parnauite is associated with chrysocolla,
brochantite, malachite,
tyrolite and connellite
(HOM).
At the type locality, Majuba Hill, Nevada, USA, parnauite occurs in the oxidised zone of a
hydrothermal copper-tin orebody in
rhyolite associated with
spangolite, chalcophyllite,
chenevixite, goudeyite,
malachite, azurite,
brochantite and chrysocolla
(HOM).
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