Database of Zeolite Structures
 

Framework Type MTW
Reference Material
  Material Name: ZSM-12    
 
Chemical Formula:		  
|Nax (H2O)4|2 [AlxSi28-xO56]2-MTW  (x<2.5)
  
   
Unit Cell:§ 		 
monoclinic
 C 1 2/c 1 (# 15)
    a' = 24.8630 Å b' = 5.0120 Å c' = 24.3280 Å  
    α' = 90.000° β' = 107.720° γ' = 90.000°  
   
Framework Density: 		 
19.4 T/1000 Å3
 
  
Channels: 		 
[010] 12 5.6 x 6.0*
Dimensionality
  Sorption (molecular cross section > 3.4Å): 1-dimensional
  Topological (pore opening > 6-ring): 1-dimensional
   
References:
  LaPierre, R.B., Rohrman Jr., A.C., Schlenker, J.L., Wood, J.D., Rubin, M.K. and Rohrbaugh, W.J.
  "The framework topology of ZSM-12: A high-silica zeolite"
Zeolites, 5, 346-348 (1985)
Material name:   ZSM-12
Chemical formula:   [AlxSi28-xO56]2-MTW  (x<2.5)
  § Fyfe, C.A., Gies, H., Kokotailo, G.T., Marler, B. and Cox, D.E.
  "Crystal structure of silica-ZSM-12 by the combined use of high-resolution solid-state MAS NMR spectroscopy and synchrotron x-ray powder diffraction"
J. Phys. Chem., 94, 3718-3721 (1990)
 
  
Name and Code derivation:
    Zeolite Socony Mobil - twelve
  ZSM-12 (twelve)
  MTW
 
 
§ Chemical Formula and Unit Cell taken from the reference marked with this sign
Limiting Rings
 
12-ring viewed along [010]


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