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Journal or power sources. 2008, 183, 454-463.

The peaks at 1226 (vas),
1093 (vas) and 791 cm−1 (vs) were assigned to the vibrations of
the (Si, Al)O4 tetrahedral units, which designated as TO4 in the
framework of zeolite beta. The peaks at 430 and 470 cm−1 were
assigned to pore open and TO bend, respectively. The peaks at 523
and 569cm−1 were assigned to double ring vibrations.
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C.T. Brigden, C.D. Williams, Micro. Meso. Mater. 100 (2007) 118¨C127.
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