Database of Zeolite Structures
 
 
Framework Type DDR
Framework
Cell Parameters: trigonal R -3 m (# 166)  
    a = 13.7950 Å b = 13.7950 Å c = 40.7500Å  
  α = 90.000° β = 90.000° γ = 120.000°  
Volume = 6716.0Å3  
RDLS = 0.0035  
  Framework density (FDSi): 17.9 T/1000 Å3  
  Topological density: TD10 = 968 TD = 0.850801  
Ring sizes (# T-atoms): 8  6  5  4    
Channel dimensionality: Topological (pore opening > 6-ring): 2-dimensional  
  Maximum diameter of a sphere:  
  that can be included 7.66 Å  
that can diffuse along a:   3.65 Å b:   3.65 Å c:   2.63 Å  
Accessible volume: 9.21   %  
Secondary Building Units: combinations only          
Composite Building Units:
mtn (t-red )
Natural Tiling t-det t-dtr t-red
Framework images
(click on icon for larger image)

Viewed along [110]

projection along [110]
8-ring channel along [100]

 


Year code assigned 1987
Data last updated Jul 1, 2007