Mineral Information and Data:

Vrbaite
Hg3Tl4As8Sb2S20 [CNMNC approved formula]

Named for Karl Vrba (1845-1922), Czech mineralogist.

IMA status : Valid species (Pre-IMA 1912) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
03.07.15.01  
  (03) Sulfides - Sulfosalts
  (03.07) where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.15)
  
Nickel-Strunz
(10th edition) :
02.HF.20
  (02) Sulfides
  (02.H) Sulfosalts of SnS Archetype
  (02.HF) With SnS and PbS archetype structure units
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

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