Database of Zeolite Structures
 

Framework Type GME
Type Material
  Material Name: Gmelinite    
 
Chemical Formula:
 
|(Ca2+,Na+2)4 (H2O)24| [Al8Si16 O48]-GME
 
   
Unit Cell:
 
hexagonal

 P 63/m m c (# 194)
    a = 13.7500Å b = 13.7500Å c = 10.0500Å  
    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)
 
 
Name and Code derivation:
    Gmelinite
  GME
Limiting Rings
 
12-ring viewed along [001]

8-ring viewed normal to [001]