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Formula: Zn(AsO3OH).H2O
Hydrated acid arsenate, koritnigite group
Crystal System: Triclinic
Specific gravity: 3.54 measured, 3.56 calculated
Hardness: 2
Streak: White
Colour: Colourless to white
Solubility: Soluble in cold hydrochloric and nitric acid
Environments
Localities
At the Svornost mine, Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic, koritnigite is associated with
erythrite, arsenolite and
sphalerite
(HOM).
At the type locality, the Tsumeb mine, Tsumeb, Oshikoto Region, Namibia, koritnigite occurs as a
secondary mineral of the lower oxidation zone in a
dolostone-hosted polymetallic hydrothermal ore deposit. Associated minerals include
tennantite, copper-bearing
adamite, stranskiite,
lavendulan, köttigite,
tsumcorite, prosperite and
o’danielite
(AM 65.206, Dana, HOM).
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