Database of Disordered Zeolite Structures
 
Intergrowth Family ERI-LEV
Periodic Building Unit
 
  Periodic Building Unit (PerBU): ABC-6 layer of hexagonally arranged (isolated) 6-rings  
 
  Layer symmetry P (6) m m  
 
  2D cell parameters a = 13.05 Å b = 13.05 Å gamma = 120°    
 
  References
    Xie, D.
   "Rational Design and Targeted Synthesis of Small-Pore Zeolites with the Assistance of Molecular Modeling, Structural Analysis, and Synthetic Chemistry"
   Ind. Eng. Chem. Res., 60, 15403−15415 (2021)

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 8-ring channel of ERI along [001].
Simplest ordered end members
The color of each layer reflects the translation used to generate it from the first layer (see table above).

 
  Polymorph ERI
 
Cell Parameters: hexagonal P 63/m m c: (# 194)
  a = 13.0540 Å b = 13.0540 Å c = 15.1750 Å  
  α = 90.000° β = 90.000° γ = 120.000°  
  Volume = 2239.5 Å3
Framework Density (FDSi): 16.1
Ring sizes (# T-atoms): 8  6  4    
Channel dimensionality: Topological (pore opening > 6-ring): 3-dimensional  
ABC-6 sequence: AABAAC   sequence of ABC-6 layers
  Maximum diameter of a sphere:  
    that can be included 7.04 Å  
    that can diffuse along a:  3.42 Å b:  3.42 Å c:  3.42 Å  
    addional volume data  
Composite Building Units:
d6r
can
In this space group and setting, the PerBUs are stacked along [001]
Note: This polymorph corresponds to the ordered framework ERI
 
 
  Polymorph LEV
 
Cell Parameters: trigonal R -3 m:H (# 166)
  a = 13.1680 Å b = 13.1680 Å c = 22.5780 Å  
  α = 90.000° β = 90.000° γ = 120.000°  
  Volume = 3390.5 Å3
Framework Density (FDSi): 15.9
Ring sizes (# T-atoms): 8  6  4    
Channel dimensionality: Topological (pore opening > 6-ring): 2-dimensional  
ABC-6 sequence: AABCCABBC   sequence of ABC-6 layers
  Maximum diameter of a sphere:  
    that can be included 7.1 Å  
    that can diffuse along a:  3.53 Å b:  3.53 Å c:  2.5 Å  
    addional volume data  
Composite Building Units:
d6r
lev
In this space group and setting, the PerBUs are stacked along [001]
Note: This polymorph corresponds to the ordered framework LEV
 

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