Mineral Information and Data:

Copiapite
Fe2+Fe3+4(SO4)6(OH)2 • 20H2O [CNMNC approved formula]

Named after its locality: Copiapo, Chile.

IMA status : Valid species (Pre-IMA 1833) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
31.10.05.01  
  (31) Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.10) miscellaneous
  (31.10.05) Copiapite Group
  
Nickel-Strunz
(10th edition) :
07.DB.3
  (07) Sulfates (selenates, tellurates, chromates, molybdates, wolframates)
  (07.D) Sulfates (selenates, etc.) with additional anions, with H2O
  (07.DB) With only medium-sized cations; insular octahedra and finite units
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  
Other Properties: H2O Soluble.

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