Database of Disordered Zeolite Structures
 
Intergrowth Family Ferrierite
Fault Planes
Framework: FER
Cell Parameters: orthorhombic I m m m (# 71)
    a = 19.0180 Å b = 14.3030 Å c = 7.5410 Å  
  α = 90.000° β = 90.000° γ = 90.000°  
  Ring sizes (# T-atoms): 10  8  6  5      
Channel dimensionality: Topological (pore opening > 6-ring): 2-dimensional  
  References

    Gramlich-Meier, R., Meier,  W. M. and Smith,  Β. K.
   "On faults in the framework structure of the zeolite ferrierite"
  Z. Kristallogr., 169, 201-210 (1984)

 
Plane
Orientation
Symmetry
Operation
Translation Comment
(010)
1/2c
blue line in the figure on the right
(110)
1/2c
red line in the figure on the right
 

Note
Sigma expansions and contractions along (010) have also been suggested (see reference above). These would change the ring size at the fault plane.
The fault planes shown below do not alter the ring size.
Drawings of the fault planes
The color of the second domain reflects the symmetry operation and/or translation shown in the table above.
 
  Fault plane (010)
 
This is a possible way of connecting the two blocks along the fault plane (010). There is no experimental proof that this fault plane is exactly as shown.

 
 
  Fault plane (110)
 
This is a possible way of connecting the two blocks along the fault plane (110). There is no experimental proof that this fault plane is exactly as shown.