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Formula: HgI
Normal halide of mercury,
calomel group
Crystal System: Tetragonal
Hardness: 1 to 2
Streak: Brown
Colour: Citrus-yellow, changing immediately to dark olive-green on exposure to light
Environments
Localities
At the type locality, the Backofen mine, Landsberg, Obermoschel, Nordpfälzer Land, Donnersberg District,
Rhineland-Palatinate, Germany, moschelite occurs in a
sandstone-hosted mercury
deposit, the iodine thought to be provided from underlying coal beds. Associated minerals include
mercury, cinnabar,
metacinnabar, calomel,
terlinguaite, eglestonite,
tetrahedrite, malachite,
azurite, gypsum,
aragonite, lepidocrocite,
iron oxides and quartz
(HOM).
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