Mineral Information and Data:

Middendorfite
K3Na2Mn5Si12(O,OH)36 • 2H2O [CNMNC approved formula]

Named for A.F. von Middendorff (1815-1894), an outstanding scientist, who carried out the first mineralogical investigations in the Khibiny pluton.

IMA status : Approved Species 2005 ()
CLASSIFICATION 
Dana
(8th edition) :
74.01.01.05  (This Dana# Added)
  (74) Phyllosilicate Modulated Layers
  (74.01) with joined islands
  (74.01.01) Stilpnomelane group
  
Nickel-Strunz
(10th edition) :
09.EJ.10
  (09) Silicates
  (09.E) Phyllosilicates
  (09.EJ) Unclassified phyllosilicates
  
Crystal system: Monoclinic System
Point group (H-M): Unknown — Unk
  
  
  

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