Database of Zeolite Structures
 
Framework Type ATV
31P MAS NMR spectrum of AlPO-25 (formed by calcination of AlPO-21)


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
P1
T1
Q4(4Al)
-30.15
2.00
3.79
0.179
P2
T2
Q4(4Al)
-27.45
1.00
3.79
0.179



References
Spectrum

  Authors: Jelinek, R., Chmelka, B.F., Wu, Y., Grandinetti, P.J., Pines, A., Barrie, P.J., Klinowski, J.
  Title: Study of the Aluminophosphates AlPO4-21 and AlPO4-25 by 27Al Double-Rotation NMR
  Reference: J. Am. Chem. Soc., 113, 4097-4101 (1991)
  Figure: Figure 6a  

Peak Assignment

  Authors: Jelinek, R., Chmelka, B.F., Wu, Y., Grandinetti, P.J., Pines, A., Barrie, P.J., Klinowski, J.
  Title: Study of the Aluminophosphates AlPO4-21 and AlPO4-25 by 27Al Double-Rotation NMR
  Reference: J. Am. Chem. Soc., 113, 4097-4101 (1991)
  Method: single peak
  Figure: Figure 6a  

Crystal Structure

  Authors: Richardson Jr., J.W., Smith, J.V. and Pluth, J.J.
  Title: AlPO4-25: Framework topology, topotactic transformation from AlPO4-21 and high-low displacive transition
  Reference: J. Phys. Chem., 94, 3365-3367 (1990)
Spectrum information

  Obs. freq. 201.84 MHz (Field = 11.7 Tesla)
  Pulse sequence single pulse
  MAS frequency 5.5 kHz
  Spectrum Digitized and processed by Brouwer Lab, Redeemer University
  Data processing Spectrum digitized with WebPlotDigitizer and deconvoluted with Mathematica notebook
 
  CommentAl and P sites are not distinguished from each other in the crystal structure, which was determined at high temperature (593 K) compared to the NMR spectrum collected at room temperature.

Chemical Formula

  [Al - P - O]-ATV

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)