Mineral Information and Data:

Ganophyllite
(K,Na)x(Mn2+,Al,Mg)6(Si,Al)10O24(OH)4 • nH2O(x=1-2n=7-11) [CNMNC approved formula]

Named From the Greek for "luster" and "leaf" for the high luster on cleavage planes.

IMA status : Valid species (Pre-IMA 1890) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
74.01.02.01  
  (74) Phyllosilicate Modulated Layers
  (74.01) with joined islands
  (74.01.02) Ganophyllite group
  
Nickel-Strunz
(10th edition) :
09.EG.30
  (09) Silicates
  (09.E) Phyllosilicates
  (09.EG) Double nets with 6-membered and larger rings
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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