Mineral Information and Data:

Chelkarite
CaMgB2O4Cl2 • 7H2O [CNMNC approved formula]

Named for the locality: Chelkar salt dome, Ak-sat Valley, Uralsk district, Kazakhstan.

IMA status : Valid species (Pre-IMA 1968) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
26.07.02.01  
  (26) Hydrated Borates Containing Hydroxyl or Halogen
  (26.07)
  (26.07.02)
  
Nickel-Strunz
(10th edition) :
06.HA.05
  (06) Borates
  (06.H) Unclassified Borates
  (06.HA)
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

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