Formula: Mn2+2(AsO4)(OH)
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

Metamorphic 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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