Database of Zeolite Structures
 

Framework Type GME
Reference Material
  Material Name: Gmelinite    
 
Chemical Formula:		  
|(Ca,Na2)4 (H2O)24 | [Al8Si16O48]-GME		  
   
Unit Cell: 		 
hexagonal
 P 63/m m c (# 194)
    a' = 13.7500 Å b' = 13.7500 Å c' = 10.0500 Å  
    α' = 90.000° β' = 90.000° γ' = 120.000°  
   
Framework Density: 		 
14.6 T/1000 Å3
 
  
Channels: 		 
[001] 12 7.0 x 7.0* <-> [001] 8 3.6 x 3.9**
Dimensionality
  Sorption (molecular cross section > 3.4Å): 3-dimensional
  Topological (pore opening > 6-ring): 3-dimensional
   
References:
  Fischer, K.
  "Untersuchung der Kristallstruktur von Gmelinit"
N. Jb. Miner. Mh., , 1-13 (1966)
  Dusselier, M., Kang, J.H., Xie, D. and Davis, M.E.
  "CIT-9: A Fault-Free Gmelinite Zeolite"
Angew. Chem. Int. Ed., 56, 13475-13478 (2017)
Material name:   CIT-9, as-made
Chemical formula:   |Na - OSDA - H2O| [Si24-xAlxO48]-GME  (x=4.8-6)
 
  
Name and Code derivation:
    Gmelinite
  GME
Limiting Rings
 
12-ring viewed along [001]

8-ring viewed normal to [001]


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