Mineral Information and Data:

Dawsonite
NaAlCO3(OH)2 [CNMNC approved formula]

Named after the Canadian geologist, J. W. Dawson (1820-1899).

IMA status : Valid species (Pre-IMA 1874) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
16a.03.08.01  
  (16a) Carbonates - Hydroxyl or Halogen
  (16a.03) where (A B)2 (XO3) Zq
  (16a.03.08)
  
Nickel-Strunz
(10th edition) :
05.BB.10
  (05) Carbonates and Nitrates
  (05.B) Carbonates with additional anions, without H2O
  (05.BB) With alkalies, etc.
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

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