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Formula: K2CuCl4.2H2O
Halide complex
Crystal System: Tetragonal
Specific gravity: 2.418 measured, 2.41 calculated
Hardness: 2½
Colour: Greenish blue, colourless in transmitted light
Solubility: Soluble in water
Environments
Localities
At the type locality, Mt Vesuvius, Somma-Vesuvius Complex, Naples, Campania, Italy, mitscherlichite
was found as minute crystals on a small stalactite of salts; it is a
secondary product of the fumarolic activity, and occurs
with sylvite, metavoltine
and gypsum
(AM 14.387-388, Mindat).
At the Glavnaya Tenoritovaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption
Tolbachik volcano, Kamchatka Krai, Russia, mitscherlichite occurs as an alteration product of
ponomarevite. Associated minerals include
ponomarevite,
tolbachite,
dolerophanite, piypite,
chalcocyanite, halite,
sylvite and tenorite
(HOM).
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