General Information:
Chemical Formula:Hg2Cl2
Composition:(Molecular Weight = 472.09 gm)Mercury 84.98 %
HgChlorine 15.02 %
Cl Empirical Formula: Hg2Cl2
Environment:Oxidized mercury deposits.
Locality:Terlingua, Brewster Co., Texas, USA.
Name Origin:From the Greek, kalos - "beautiful" and melas - "black."
Physical Properties: Cleavage:[100] Poor, [011] Poor
Color:white, yellowish gray, gray, yellowish white, or brown.
Density:6.4 - 6.5, Average = 6.45
Diaphaniety:Translucent to subtranslucent
Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).,
Hardness:1.5-2 - Talc-Gypsum
Luminescence:Fluorescent.
Luster:Adamantine - Resinous
Streak:pale yellowish white
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