Mineral Information and Data:

Brianroulstonite
Ca3B5O6(OH)7Cl2 • 8H2O [CNMNC approved formula]

Named for Brian V. Roulston (1948-), in recognition of his work on the geology of evaporite deposits.

IMA status : Approved Species 1997 ()
CLASSIFICATION 
Dana
(8th edition) :
26.05.17.03  
  (26) Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)
  (26.05.17) Pringleite Group
  
Nickel-Strunz
(10th edition) :
06.EC.35
  (06) Borates
  (06.E) Pentaborates
  (06.EC) Phyllo-pentaborates
  
Crystal system: Monoclinic System
Point group (H-M): m — domatic
  
  
  

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