Formula: Ca2Cu2Si3O10.2H2O
Sorosilicate (Si2O7 groups)
Crystal System: Monoclinic
Specific gravity: 3.13 to 3.19 measured. 3.193 calculated
Hardness: 2½
Streak: Light blue
Colour: Azure blue
Solubility: Decomposed by hydrochloric acid
Common impurities: Mg
Environments:
Metamorphic environments
Hydrothermal environments
Basaltic cavities
Localities
At the Christmas mine, Gila county, Arizona, USA, kinoite is associated with
apophyllite and ruizite
(Dana, R&M 87.1.50).
At Helvetia, Pima county, Arizona, USA, kinoite is associated with
apophyllite
(Dana).
At the type locality, the Santa Rita Mountains, Pima County, Arizona, USA, kinoite occurs in veinlets and
as crystals embedded in apophyllite in mineralised, brecciated
diopside-garnet-calcite-quartz
skarn
(Mindat, R&M 87.1.50),
associated with
apophyllite, native copper and
copper sulphide minerals. It is clearly contemporaneous with apophyllite
and of primary origin
(AM55.709).
Also native copper is found
embedded in apophyllite crystals with kinoite
(R&M 87.1.50).
At the Twin Buttes mine, Pima County, Arizona, USA, kinoite is associated with
stringhamite,
native copper, wollastonite,
and an apophyllite group mineral
(R&M 87.1.50).
Kinoite from Arizona is related to late-stage
retrograde activity that altered a
skarn mineral assemblage
composed of diopside, grossular,
calcite, and
quartz. Less common
accessory minerals include gilalite,
apachite, stringhamite,
junitoite, clinohedrite and
xonotlite
(R&M 86.5.458).
At Calumet, Michigan, USA, kinoite occurs in vesicles in basaltic
lava flows and enclosed in
quartz and
calcite
(Dana).
It is associated with
quartz, calcite,
native copper, native silver,
epidote, pumpellyite,
saponite, datolite and
chlorite
(HOM, R&M 86.5.458, R&M 87.1.50).
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