Database of Zeolite Structures
 
Framework Type MEP
29Si CP MAS NMR spectrum of natural melanophlogite (cubic phase at 363 K)


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
Si3
T3
Q4(0Al)
-121.36
3.000
0.81
0.467
Si2
T2
Q4(0Al)
-119.96
8.000
0.87
0.467
Si1
T1
Q4(0Al)
-118.36
12.000
0.81
0.467


References
Spectrum

  Authors: Fyfe, C.A., Gies, H.
  Title: A 29Si NMR study of natural and synthetic melanophlogites, the silica analogues of the clathrate hydrates of type I
  Reference: J. Inclusion Phenom. Mol., 8, 235-239 (1990)
  Figure: Figure 1a  

Peak Assignment

  Authors: Fyfe, C.A., Gies, H.
  Title: A 29Si NMR study of natural and synthetic melanophlogites, the silica analogues of the clathrate hydrates of type I
  Reference: J. Inclusion Phenom. Mol., 8, 235-239 (1990)
  Method: relative intensities
  Figure: Figure 1a  

Crystal Structure

  Authors: Gies, H.
  Title: Studies on clathrasils. III. Crystal structure of melanophlogite, a natural clathrate compound of silica
  Reference: Z. Kristallogr., 164, 247-257 (1983)

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. 79.6 MHz (Field = 9.4 Tesla)
  Pulse sequence cross polarization
  MAS frequency 3.5 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]-MEP

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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