Mineral Information and Data:

Manganogrunerite
[]Mn2Fe2+5Si8O22(OH)2 [CNMNC approved formula]

Named Renamed IMA 1997 as the Mn analog of grunerite, Formerly dannemorite (1855) which was named after its locality: Dannemora, Uppsala, Sweden.

IMA status : Renamed IMA Approved; 1997 ()
CLASSIFICATION 
Dana
(8th edition) :
66.01.01.05  
  (66) Inosilicate Double-Width Unbranched Chains, W=2
  (66.01) with P=2 amphibole configuration
  (66.01.01) Group 1, the Mg-Fe-Mn-Li amphiboles (Monoclinic)
  
Nickel-Strunz
(10th edition) :
09.DE.05
  (09) Silicates
  (09.D) Inosilicates* Structural terminology per Liebau (1985)
  (09.DE) with 2-periodic double chains, Si4O11; Clinoamphiboles
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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