Mineral Information and Data:

Jalpaite
Ag3CuS2 [CNMNC approved formula]

Named for the Mexican locality at Jalpa.

IMA status : Valid species (Pre-IMA 1858) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
02.04.04.01  
  (02) Sulfides - Including Selenides and Tellurides
  (02.04) where Am Bn Xp, with (m+n):p=2:1
  (02.04.04)
  
Nickel-Strunz
(10th edition) :
02.BA.25c
  (02) Sulfides
  (02.B) Metal Sulfides, M:S > 1:1 (mainly 2:1)
  (02.BA) With Cu, Ag, Au
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
  
  
  

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