Mineral Information and Data:

Fougerite
Fe2+6Fe3+2(OH)18 • 4H2O [CNMNC approved formula]

Named for the locality : Discovered coloring (green) the soil of the Fougères Forest in the Ille-et-Vilaine region of France.

IMA status : Approved Species 2003 ()
CLASSIFICATION 
Dana
(8th edition) :
06.04.06.02  
  (06) Hydroxides and Oxides Containing Hydroxyl
  (06.04) containing multiple cations
  (06.04.06)
  
Nickel-Strunz
(10th edition) :
04.FE.05
  (04) Oxides and Hydroxides
  (04.F) Hydroxides (without V or U)
  (04.FE) Hydroxides with OH, without H2O; sheets of edge-sharing octahedra
  
Crystal system: Trigonal System
Point group (H-M): 3m (or 3 2/m) — hexagonal-scalenohedral
  
  
  

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