Mineral Information and Data:

Gabrielite
Tl2AgCu2As3S7 [CNMNC approved formula]

Named Nameed for Walter Gabriel (b. 1943), of Basel, Switzerland, a well-known mineral photographer and expert on Lengenbach minerals.

IMA status : Approved Species 2002 ()
CLASSIFICATION 
Dana
(8th edition) :
03.05.11.02  
  (03) Sulfides - Sulfosalts
  (03.05) where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.05.11)
  
Nickel-Strunz
(10th edition) :
02.HD.60
  (02) Sulfides
  (02.H) Sulfosalts of SnS Archetype
  (02.HD) With Tl
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  

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