Database of Zeolite Structures
 

Framework Type ISV
Reference Material
  Material Name: ITQ-7    
 
Chemical Formula:
 
[Si64O128]-ISV
 
   
Unit Cell:
 
tetragonal

 P 42/m m c (# 131)
    a' = 12.8530 Å b' = 12.8530 Å c' = 25.2140 Å  
    α' = 90.000° β' = 90.000° γ' = 90.000°  
   
Framework Density:
 
15.4 T/1000 Å3
 
 
Channels:
 
<100> 12 6.1 x 6.5** <-> [001] 12 5.9 x 6.6*
Dimensionality
  Sorption (molecular cross section > 3.4Å): 3-dimensional
  Topological (pore opening > 6-ring): 3-dimensional
   
References:
  Villaescusa, L.A., Barrett, P.A. and Camblor, M.A.
  "ITQ-7: A new pure silica polymorph with a three-dimensional system of large pore channels"
Angew. Chem. Int. Ed., 38, 1997-2000 (1999)
 
 
Name and Code derivation:
    Instituto de Tecnologia Quimica Valencia - seven
  ITQ-7 (seven)
  ISV
Limiting Rings
 
12-ring viewed along <100>

12-ring viewed along [001]