Database of Zeolite Structures
 
Framework Type MEI
29Si MAS NMR spectrum of calcined dealuminated ZSM-18


Note: Toggle plots by clicking on the legend

Peak
T site
Q-type
Chemical Shift
Relative
Peak Width
Peak Shape
Assigment
(topological)
(ppm)
Peak Area
(ppm)
(x)L (1-x)G
Si1
T4
Q4(0Al)
-113.68
2.000
1.34
1.000
Si3
T2
Q4(0Al)
-109.23
6.000
2.18
1.000
Si2
T1
Q4(0Al)
-109.23
6.000
2.18
1.000
Si4
T3
Q4(0Al)
-104.27
3.000
1.76
1.000


References
Spectrum

  Authors: Schmitt, K.D., Kennedy, G.J.
  Title: Toward the rational design of zeolite synthesis: the synthesis of zeolite ZSM-18
  Reference: Zeolites, 14, 635-642 (1994)
  Figure: Figure 4  

Peak Assignment

  Authors: Schmitt, K.D., Kennedy, G.J.
  Title: Toward the rational design of zeolite synthesis: the synthesis of zeolite ZSM-18
  Reference: Zeolites, 14, 635-642 (1994)
  Method: relative intensities
  Figure: Table 1  

Crystal Structure

  Authors: Lawton, S.L. and Rohrbaugh, W.J.
  Title: The framework topology of ZSM-18, a novel zeolite containing rings of three (Si,Al)-O species
  Reference: Science, 247, 1319-1321 (1990)

Digitization and Modeling of Spectrum

  To reference this collection of solid-state NMR spectra, we suggest:
  Authors: Brouwer, D.H., Brouwer, C.C., Mesa, S., Semelhago, C.A., Steckley, E.E., Sun, M.P.Y., Mikolajewski, J.G., and Baerlocher, Ch.
  Title: Solid-state 29Si NMR spectra of pure silica zeolites for the International Zeolite Association Database of Zeolite Structures
  Reference: Microporous Mesoporous Mat., 297, 110000 (2020)
Spectrum information

  Obs. freq. 79.47 MHz (Field = 9.4 Tesla)
  Pulse sequence single pulse
  MAS frequency 5 kHz
  Spectrum Digitized and processed by Brouwer Lab, Redeemer University
  Data processing Spectrum digitized with WebPlotDigitizer and deconvoluted with Mathematica notebook
 

Chemical Formula

  [Si - O]-MEI

Downloads

  Download digitized spectrum in JCAMP-DX format
(This file includes also the data listed on this page)
  Download all lines from the above plot in .csv format
(This file contains only the plotted data)

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