Mineral Information and Data:

Grechishchevite
Hg3S2BrCl0.5I0.5 [CNMNC approved formula]

Named for Oleg Konstantinovich Grechishchev, Russian engineering geologist, long-time student of mercury ores from Tuva, Siberia.

IMA status : Approved Species 1990 ()
CLASSIFICATION 
Dana
(8th edition) :
10.03.05.01  
  (10) Oxyhalides and Hydroxyhalides
  (10.03) where (A)3 (O,OH)2 Xq
  (10.03.05)
  
Nickel-Strunz
(10th edition) :
02.FC.15
  (02) Sulfides
  (02.F) Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  (02.FC) With Cl, Br, I (halide-sulfides)
  
Crystal system:  
Point group (H-M):
  
  
  

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