Database of Zeolite Structures
 

Framework Type IWS
Reference Material
  Material Name: ITQ-26    
 
Chemical Formula:		  
[Ge27.2Si108.8O272]-IWS		  
   
Unit Cell: 		 
tetragonal
 I 4/m m m (# 139)
    a' = 26.7769 Å b' = 26.7769 Å c' = 13.2505 Å  
    α' = 90.000° β' = 90.000° γ' = 90.000°  
   
Framework Density: 		 
14.3 T/1000 Å3
 
  
Channels: 		 
<100> 12 7.0 x 7.3** <-> [001] 12 7.0 x 7.0*
Dimensionality
  Sorption (molecular cross section > 3.4Å): 3-dimensional
  Topological (pore opening > 6-ring): 3-dimensional
 
Stability:		  
stable to calcination
   
References:
  Dorset, D.L., Strohmaier, K.G., Kliewer, C.E., Corma, A., Díaz-Cabañas, M.J., Rey, F. and Gilmore, C.J.
  "Crystal structure of ITQ-26, a 3D framework with extra-large pores"
Chem. Mater., 20, 5325-5331 (2008)
 
  
Name and Code derivation:
    Instituto de Tecnologia Quimica Valencia - twenty-six
  ITQ-26 (twenty-six)
  IWS
Limiting Rings
 
12-ring viewed along <100>

12-ring viewed along [001]


Copyright © 2017 Structure Commission of the International Zeolite Association (IZA-SC)