Mineral Information and Data:

Liroconite
Cu2AlAsO4(OH)4 • 4H2O [CNMNC approved formula]

Named From the Greek, liros - "pale" and konia - "powder.".

IMA status : Valid species (Pre-IMA 1825) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
42.02.01.01  
  (42) Hydrated Phosphates Containing Hydroxyl or Halogen
  (42.02) where (AB)3 (XO4) Zq · x(H2O)
  (42.02.01)
  
Nickel-Strunz
(10th edition) :
08.DF.20
  (08) Phosphates, Arsenates, Vanadates
  (08.D) Phosphates, etc
  (08.DF) With only medium-sized cations, (OH,etc.):RO4 > 3:1
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  
Other Properties: Gemstone Extremely Rare.

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