Mineral Information and Data:

Sulphotsumoite
Bi3Te2S [CNMNC approved formula]

Named in allusion to the chemical relationship with tsumoite.

IMA status : Approved Species 1982 ()
CLASSIFICATION 
Dana
(8th edition) :
02.08.20.02  
  (02) Sulfides - Including Selenides and Tellurides
  (02.08) where Am Bn Xp, with (m+n):p=1:1
  (02.08.20) Tsumoite Group (Trigonal: P-3m1)
  
Nickel-Strunz
(10th edition) :
02.DC.05b
  (02) Sulfides
  (02.D) Metal Sulfides, M:S = 3:4 and 2:3
  (02.DC) Variable M:S
  
Crystal system: Trigonal System
Point group (H-M): 3m (or 3 2/m) — hexagonal-scalenohedral
  
  
  

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