Mineral Information and Data:

Gjerdingenite-Mn
K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 • 6H2O [CNMNC approved formula]

Named as the Mn-dominant analogue of gjerdingenite-Fe.

IMA status : Approved Species 2004 ()
CLASSIFICATION 
Dana
(8th edition) :
60.01.03e.05  (This Dana# Added)
  (60) Cyclosilicate Four-Membered Rings
  (60.01) as Titanosilicates
  (60.01.03e) Labuntsovite Group (Labuntsovite subgroup Monoclinic [C2/m])
  
Nickel-Strunz
(10th edition) :
09.CE.30c
  (09) Silicates
  (09.C) Cyclosilicates
  (09.CE) [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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