Database of Disordered Zeolite Structures
 
Intergrowth Family CAN-SOD
Periodic Building Unit
 
  Periodic Building Unit (PerBU): ABC-6 layer of hexagonally arranged (isolated) 6-rings  
 
  Layer symmetry P (6) m m  
 
 
  References

    Buhl, J.C. and Cramm, S.
   "Synthesis of nanocrystalline nitrate enclathrated zeolite with intermediate framework structure between sodalite (SOD) and cancrinite (CAN)"
  NSTI-Nabotech, , 284-287 (2011)

Connectivity pattern
Examples
The layers are stacked along the [001] direction using the following connectivity patterns

 
Symmetry
Operation*
Translation* Comment Image
  Overview showing the A, B and C positions of the ABC-6 layer
0
  A layer
1/3a, 2/3b
  B layer
2/3a, 1/3b
  C layer
 

* relative to the first layer


Effect on channel system
  The disorder blocks the 1-dimensional 12-ring channel of cancrinite.
Simplest ordered end members
The color of each layer reflects the translation used to generate it from the first layer (see table above).

 
  CAN
 
Cell Parameters: hexagonal P 63/m m c (# 194)
    a = 12.4940 Å b = 12.4940 Å c = 5.2540 Å  
  α = 90.0000° β = 90.0000° γ = 120.0000°  
Ring sizes (# T-atoms): 12 6 4  
Channel dimensionality: Topological (pore opening > 6-ring): 1-dimensional  
Channel system: [001] 12 5.9 x 5.9*  
 
ABC-6 stacking sequence: AB
In this space group and setting, the PerBUs are stacked along [001]


Note: This polymorph corresponds to the ordered framework CAN
 
 
  SOD
 
Cell Parameters: cubic I m -3 m (# 229)
    a = 8.9561 Å b = 8.9561 Å c = 8.9561 Å  
  α = 90.0000° β = 90.0000° γ = 90.0000°  
Ring sizes (# T-atoms): 6 4  
Channel dimensionality: Topological (pore opening > 6-ring): 0-dimensional  
Channel system: apertures formed by 6-rings only  
 
ABC-6 stacking sequence:  ABC
In this space group and setting, the PerBUs are stacked along [111]


Note: This polymorph corresponds to the ordered framework SOD