Database of Zeolite Structures
 

Framework Type EWF
Reference Material
  Material Name: EMM-25    
 
Chemical Formula:		  
[B2.71Si113.29O232]-EWF		  
   
Unit Cell: 		 
orthorhombic
 C m c 21 (# 36)
    a' = 11.0550 Å b' = 22.9120 Å c' = 24.9140 Å  
    α' = 90.000° β' = 90.000° γ' = 90.000°  
   
Framework Density: 		 
18.4 T/1000 Å3
 
  
Channels: 		 
[001] 11 6.0 x 4.6 <-> [100] 10 5.4 x 5.2
Dimensionality
  Sorption (molecular cross section > 3.4Å): 2-dimensional
  Topological (pore opening > 6-ring): 2-dimensional
   
References:
  Cho, J., Yun, Y., Xu, H., Sun, J., Burton, A.W., Strohmaier, K.G., Terefenko, G., Vroman, H., Afeworki, M., Cao, G., Wang, H., Zou, X., Willhammar, T.
  "EMM-25: The Structure of Two-Dimensional 11 × 10 Medium-Pore Borosilicate Zeolite Unraveled Using 3D Electron Diffraction"
Chem. Mater., 33, 4146-4135 (2021)
 
  
Name and Code derivation:
    Exxon Mobil Material - twenty five
  EMM-25 (twenty five)
  EWF
Limiting Rings
 
10-ring viewed along [100]

11-ring viewed along [001]


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