Mineral Information and Data:

Angelaite
Cu2AgPbBiS4 [CNMNC approved formula]

Named for the locality: Angela mine, district of Los Manantiales, Gastre, Chubut, Argentina.

IMA status : Approved Species 2003 (IMA2003-064)
CLASSIFICATION 
Dana
(8th edition) :
03.02.10.01  
  (03) Sulfides - Sulfosalts
  (03.02) where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.02.10)
  
Nickel-Strunz
(10th edition) :
02.JB.45
  (02) Sulfides
  (02.J) Sulfosalts of PbS Archetype
  (02.JB) Galena derivatives, with Pb
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
Unit cell: a = 4.0329Å, b = 12.734Å, c = 14.639Å α = 90.103°
Crystal Habit: crystals microscopic; anhedral grains
  
Color: Gray
Diaphaneity: Opaque
Luster: Metallic
  
Geologic Setting: Mineralization in calcalcaline andesitic to dacitic rocks of Late Jurassic age. Higher homologue of miharaite.
  

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