Mineral Information and Data:

Wickmanite
Mn2+Sn4+(OH)6 [CNMNC approved formula]

Named for Franz-Erik Wickman (1915-), Swedish mineralogist, who studied the mineralogy of the Langban area.

IMA status : Approved Species 1967 ()
CLASSIFICATION 
Dana
(8th edition) :
06.03.06.01  
  (06) Hydroxides and Oxides Containing Hydroxyl
  (06.03) with (OH)3 or (OH)6 groups
  (06.03.06) Wickmanite group (Cubic or Trigonal, 2+ cations containing Sn)
  
Nickel-Strunz
(10th edition) :
04.FC.10
  (04) Oxides and Hydroxides
  (04.F) Hydroxides (without V or U)
  (04.FC) Hydroxides with OH, without H2O; corner-sharing octahedra
  
Crystal system: Cubic System
Point group (H-M): m3m (or 4/m 3 2/m) — hexoctahedral
  
  
  

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