Mineral Information and Data:

Garronite
NaCa2.5(Si10Al6)O32 • 13H2O [CNMNC approved formula]

Named after its locality: Slopes of Glenariff Valley, Garron Plateau, County Antrim, Northern Ireland.

IMA status : Approved Species 1962 ()
CLASSIFICATION 
Dana
(8th edition) :
77.01.03.03  
  (77) Tectosilicate Zeolite group
  (77.01) true zeolites
  (77.01.03) Gismondine and related species
  
Nickel-Strunz
(10th edition) :
09.GC.05
  (09) Silicates
  (09.G) Tektosilicates with Zeolitic H2O
  (09.GC) Chains of doubly-connected 4-membered rings
  
Crystal system: Tetragonal System
Point group (H-M): 4/m — dipyramidal
  
  
  

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