Mineral Information and Data:

Vesignieite
Cu3Ba(VO4)2(OH)2 [CNMNC approved formula]

Named after the French mineral collector, Colonel Jean Paul Louis Vesignie (1870-1954) and former president of the Mineralgical Society of France.

IMA status : Valid species (Pre-IMA 1955) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
41.05.13.01  
  (41) Anhydrous Phosphates Containing Hydroxyl or Halogen
  (41.05) where (A B)2 (XO4) Zq
  (41.05.13)
  
Nickel-Strunz
(10th edition) :
08.BH.45
  (08) Phosphates, Arsenates, Vanadates
  (08.B) Phosphates, etc. with Additional Anions, without H2O
  (08.BH) With medium-sized and large cations, (OH,etc.):RO4 = 1:1
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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