Mineral Information and Data:

Grumantite
NaSi2O4(OH) • H2O [CNMNC approved formula]

Named from the old Russian name for the Spitzbergen Archipelago, Arctic Ocean.

IMA status : Approved Species 1987 ()
CLASSIFICATION 
Dana
(8th edition) :
78.04.05.01  
  (78) Unclassified silicates
  (78.04) possible inosilicates
  (78.04.05)
  
Nickel-Strunz
(10th edition) :
09.EH.10
  (09) Silicates
  (09.E) Phyllosilicates
  (09.EH) Transitional structures between phyllosilicate and other silicate units
  
Crystal system: Orthorhombic System
Point group (H-M): mm2 — pyramidal
  
  
  

<<< BACK TO MINERAL SEARCH