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Formula: Mn2+2(AsO4)(OH)
Arsenate, manganese-bearing mineral
Crystal System: Monoclinic
Specific gravity: 4.08 to 4.18
Hardness: 4 to 5
Streak: red to yellow
Colour: Red, rose-red, reddish-yellow, yellow, pinkish; light rose or yellow in transmitted light.
Solubility: Readily soluble in dilute acids
Environments:
Sarkinite is a rare arsenate.
In the Ködnitz valley, Tyrol, Austria, sarkinite occurs in manganese-rich lenses in
quartz - chlorite
schist, probably of marine origin, associated with
tephroite, pyroxmangite,
rhodonite, spessartine,
rhodochrosite and tiragalloite
(HOM).
At the Sjö mine, Dalarna, Sweden, sarkinite is associated with katoptrite,
magnetite, jacobsite
and tephroite
(HOM).
At the type locality, the Harstigen Mine, Värmland, Sweden, sarkinite occurs in a metamorphosed
iron-manganese
ore body, associated with native lead,
calcite, brandtite,
bementite and baryte
(Mindat, HOM).
At Långban, Värmland, Sweden, sarkinite is associated with
hausmannite and hedyphane
(Dana).
At the Falotta mine, Switzerland, sarkinite is associated with grischunite,
brandtite,
manganoan berzeliite, tilasite,
rhodochrosite and
braunite
(HOM).
At Sterling Hill, New Jersey, USA, sarkinite occurs in metamorphosed stratiform zinc orebodies,
associated with eveite, adamite,
willemite, allactite,
brandtite, parabrandtite,
kraisslite, copper,
euchroite, serpierite,
rhodochrosite and
baryte
(HOM).
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