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Formula: (Hg2N)(Cl,SO4).nH2O
Oxyhalide, paramorph of mosesite,
mercury-bearing mineral
Crystal system: Hexagonal
Specific gravity: 8
Hardness: 3½
Streak: Yellow
Colour: Light to canary-yellow, orange; darkens to reddish yellow or orange in daylight and reverts to original colour
in darkness; yellow to colourless in transmitted light
Solubility: Soluble in warm hydrochloric and nitric acid without deposition of
calomel, soluble in ammonium bromide with evolution of ammonia (Mindat)
Environments
Kleinite occurs in the oxidised portions of mercury deposits
(Webmin).
Localities
At the type locality, the Terlingua Mining District, Texas, USA, kleinite is associated with
terlinguaite, montroydite,
gypsum, calcite and
baryte
(Mindat, Dana).
Kleinite from the Terlingua Mining District -
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