Database of Zeolite Structures
 
 
Framework Type CHA
Framework
Cell Parameters: trigonal R -3 m (# 166)  
    a = 13.6750 Å b = 13.6750 Å c = 14.7670Å  
  α = 90.000° β = 90.000° γ = 120.000°  
Volume = 2391.6Å3  
RDLS = 0.0015  
  Framework density (FDSi): 15.1 T/1000 Å3  
  Topological density: TD10 = 677 TD = 0.566667  
Ring sizes (# T-atoms): 8  6  4    
Channel system: 3-dimensional  
  Maximum diameter of a sphere:  
  that can be included 7.37 Å  
that can diffuse along a:   3.72 Å b:   3.72 Å c:   3.72 Å  
Accessible volume: 17.27   %  
ABC sequence AABBCC sequence of 6-rings
Secondary Building Units: 6-6 or   6 or   4-2 or   4    
Composite Building Units:
d6r (t-hpr )
cha (t-cha )
Natural Tiling t-cha t-hpr
Framework images
(click on icon for larger image)

Viewed normal to [001]

projection along [001]

 


Year code assigned 1978
Data last updated Jul 1, 2007