Database of Zeolite Structures

Framework Type MFI
Reference Material
  Material Name: ZSM-5    
Chemical Formula:
|Nax (H2O)16| [AlxSi96-xO192]-MFI  (x<27)
Unit Cell:§

 P n m a (# 62)
    a' = 20.0700 Å b' = 19.9200 Å c' = 13.4200 Å  
    α' = 90.000° β' = 90.000° γ' = 90.000°  
Framework Density:
17.9 T/1000 Å3
{[100] 10 5.1 x 5.5 <-> [010] 10 5.3 x 5.6}***
  Sorption (molecular cross section > 3.4Å): 3-dimensional
  Topological (pore opening > 6-ring): 3-dimensional
The straight channels along [010] are connected to one another via the sinusoidal channels along [100], so by navigating alternately along the [010] and [100] channels, a molecule can also diffuse in the [001] direction.
  Kokotailo, G.T., Lawton, S.L., Olson, D.H. and Meier, W.M.
  "Structure of synthetic zeolite ZSM-5"
Nature, 272, 437-438 (1978)
Material name:   ZSM-5
Chemical formula:   [AlxSi96-xO192]-MFI  (x<27)
  § Olson, D.H., Kokotailo, G.T., Lawton, S.L. and Meier, W.M.
  "Crystal Structure and Structure-Related Properties of ZSM-5"
J. Phys. Chem., 85, 2238-2243 (1981)
  van Koningsveld, H., van Bekkum, H. and Jansen, J.C.
  "On the location and disorder of the tetrapropylammonium (TPA) ion in zeolite ZSM-5 with improved framework accuracy"
Acta Crystallogr., B43, 127-132 (1987)
Material name:   ZSM-5, as-made
Chemical formula:   [AlxSi96-xO192]-MFI  (x<27)
Name and Code derivation:
    Zeolite Socony Mobil - five
  ZSM-5 (five)
§ Chemical Formula and Unit Cell taken from the reference marked with this sign
Limiting Rings
10-ring viewed along [100]

10-ring viewed along [010]