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Bond angles, broad range

Sihcon NMR spectra of MCM-41 closely resemble those of amorphous silica suggesting a broad range of Si-O-Si (T-O-T) bond angles, imlike that of classical crystalline zeolites [7, 30] and contain a relatively high concentration of silanols. This silanol concentration appears to be highest for those structmes that demonstrate the largest unit cell contraction upon removal of the template by calcination. [Pg.101]

See other pages where Bond angles, broad range is mentioned: [Pg.100]    [Pg.16]    [Pg.79]    [Pg.143]    [Pg.16]    [Pg.65]    [Pg.155]    [Pg.16]    [Pg.63]    [Pg.227]    [Pg.430]    [Pg.5007]    [Pg.16]    [Pg.231]    [Pg.272]    [Pg.117]    [Pg.29]    [Pg.68]    [Pg.366]    [Pg.224]    [Pg.34]    [Pg.417]    [Pg.52]    [Pg.260]    [Pg.162]    [Pg.149]    [Pg.196]    [Pg.148]    [Pg.203]    [Pg.232]    [Pg.248]    [Pg.152]    [Pg.312]    [Pg.114]    [Pg.33]    [Pg.373]    [Pg.284]    [Pg.173]    [Pg.279]    [Pg.283]    [Pg.1034]    [Pg.153]    [Pg.343]    [Pg.362]    [Pg.480]    [Pg.415]    [Pg.14]    [Pg.138]    [Pg.243]   
See also in sourсe #XX -- [ Pg.101 ]



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