Mineral Information and Data:

Manganoneptunite
KNa2LiMn2+2Ti2Si8O24 [CNMNC approved formula]

Named for the composition and relationship to neptunite.

IMA status : Valid species (Pre-IMA 1923) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
70.04.01.02  
  (70) Inosilicate Column or Tube Structures
  (70.04) with linked chains forming cages
  (70.04.01) Neptunite group
  
Nickel-Strunz
(10th edition) :
09.EH.05
  (09) Silicates
  (09.E) Phyllosilicates
  (09.EH) Transitional structures between phyllosilicate and other silicate units
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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