Mineral Information and Data:

Cahnite
Ca2B(AsO4)(OH)4 [CNMNC approved formula]

Named for Lazard Cahn (1865-1940), mineral collector and dealer, Colorado Springs, Colorado, USA, who first noted the species.

IMA status : Valid species (Pre-IMA 1927) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
43.04.04.01  
  (43) Compound Phosphates
  (43.04) (Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.04)
  
Nickel-Strunz
(10th edition) :
06.AC.70
  (06) Borates
  (06.A) Monoborates
  (06.AC) B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
  
Crystal system: Tetragonal System
Point group (H-M): 4 — disphenoidal
  
  
  

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