Mineral Information and Data:

Ceruleite
Cu2Al7(AsO4)4(OH)13 • 12H2O [CNMNC approved formula]

Named from cerulean, for the sky-blue color of the mineral.

IMA status : Valid species (Pre-IMA 1900) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
42.13.06.01  
  (42) Hydrated Phosphates Containing Hydroxyl or Halogen
  (42.13)
  (42.13.06)
  
Nickel-Strunz
(10th edition) :
08.DE.25
  (08) Phosphates, Arsenates, Vanadates
  (08.D) Phosphates, etc
  (08.DE) With only medium-sized cations, (OH, etc.):RO4 = 3:1
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  

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