Mineral Information and Data:

Natrosilite
Na2Si2O5 [CNMNC approved formula]

Named for sodium, NATRium, and SILicon in the composition.

IMA status : Approved Species 1975 ()
CLASSIFICATION 
Dana
(8th edition) :
74.03.05.01  
  (74) Phyllosilicate Modulated Layers
  (74.03) with joined strips
  (74.03.05) Na phyllosilicates
  
Nickel-Strunz
(10th edition) :
09.EE.40
  (09) Silicates
  (09.E) Phyllosilicates
  (09.EE) Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  
Other Properties: H2O Soluble.

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