Mineral Information and Data:

Berndtite
SnS2 [CNMNC approved formula]

Named for Fritz Berndt, German mineralogist.

IMA status : Approved Species 1964 ()
CLASSIFICATION 
Dana
(8th edition) :
02.12.14.05  
  (02) Sulfides - Including Selenides and Tellurides
  (02.12) where Am Bn Xp, with (m+n):p=1:2
  (02.12.14) Melonite Group (Trigonal: P-3m1) AX2 type
  
Nickel-Strunz
(10th edition) :
02.EA.20
  (02) Sulfides
  (02.E) Metal Sulfides, M:S = 1:2
  (02.EA) M:S = 1:2
  
Crystal system: Trigonal System
Point group (H-M): 3m (or 3 2/m) — hexagonal-scalenohedral
  
  
  

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