Zeolite A can be described using a 11.9 primitive cubic cell with the origin at a

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Zeolite A can be described using a 11.9 Å primitive cubic cell with the origin at a β-cage centerin Figure 14.3. From the figure, make a visual estimate of the size of a sphere that would fit inside the β and α cages. By using the information in the table accompanying Problem 14.4, estimate the surface area of these spheres in a 1 g sample of zeolite A. Compare your answer to the accessible area of 1205 m/g quoted in the text.

Figure 14.3

Na2 Si Na1

Problem 14.4

Calculate the number of tetrahedral atoms per nm3 for each zeolite framework type listed in the table below. 

Name Space group Cell () Site SOD Imm LTA FAU Pmm Fdm  lad RHO Imm 8.9650 11.919 24.34  01 14.919 TI 01 02 03


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Solid State Materials Chemistry

ISBN: 9780521873253

1st Edition

Authors: Patrick M. Woodward, Pavel Karen, John S. O. Evans, Thomas Vogt

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