Mineral Information and Data:

Simmonsite
Na2LiAlF6 [CNMNC approved formula]

Named after William B. "Skip" Simmons (b. 1943), University of New Orleans, New Orleans, Louisiana, U.S.A., specialist in the mineralogy and petrology of granitic pegmatites, especi ally those of Colorado and of NYF type.

IMA status : Approved Species 1998 ()
CLASSIFICATION 
Dana
(8th edition) :
11.06.01.02  
  (11) Halide Complexes; Alumino-fluorides
  (11.06) with miscellaneous formulae
  (11.06.01) Cryolite Group
  
Nickel-Strunz
(10th edition) :
03.CB.15
  (03) Halides
  (03.C) Complex Halides
  (03.CB) Neso-aluminofluorides
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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