Mineral Information and Data:

Guanajuatite
Bi2Se3 [CNMNC approved formula]

Named for the locality: In the Santa Catarina and La Industrial mines, Sierra de Santa Rosa, near Guanajuato, Mexico.

IMA status : Valid species (Pre-IMA 1873) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
02.11.02.04  
  (02) Sulfides - Including Selenides and Tellurides
  (02.11) where Am Bn Xp, with (m+n):p=2:3
  (02.11.02) Stibnite Group (Orthorhombic: Pbnm)
  
Nickel-Strunz
(10th edition) :
02.DB.05a
  (02) Sulfides
  (02.D) Metal Sulfides, M:S = 3:4 and 2:3
  (02.DB) M:S = 2:3
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

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