Mineral Information and Data:

Chiolite
Na5Al3F14 [CNMNC approved formula]

Named from the Greek for snow and stone, as compared to cryolite, ice-stone.

IMA status : Valid species (Pre-IMA 1846) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
11.06.11.01  
  (11) Halide Complexes; Alumino-fluorides
  (11.06) with miscellaneous formulae
  (11.06.11)
  
Nickel-Strunz
(10th edition) :
03.CE.05
  (03) Halides
  (03.C) Complex Halides
  (03.CE) Phyllo-aluminofluorides
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
  
  
  
Other Properties: Gemstone Extremely Rare.

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