Mineral Information and Data:

Londonite
CsBe5Al4B11O28 [CNMNC approved formula]

Named for David London (1953-), petrologist at the University of Oklahoma, Oklahoma, USA.

IMA status : Approved Species 1999 ()
CLASSIFICATION 
Dana
(8th edition) :
25.08.02.02  
  (25) Anhydrous Borates Containing Hydroxyl or Halogen
  (25.08)
  (25.08.02)
  
Nickel-Strunz
(10th edition) :
06.GC.05
  (06) Borates
  (06.G) Heptaborates and other Megaborates
  (06.GC) Tekto-dodecaborates
  
Crystal system: Cubic System
Point group (H-M): 43m (or 4 3m) — hextetrahedral
  
  
  

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