| 摘要 |
A crystalline microporous three-dimensionally ordered solid having the generalised atomic formula:- [M<P+>(XO2)p].qYO2).wH2O (I) wherein: M is at least one cation, X is at least one of aluminium, gallium or indium, Y is at least one of silicon, germanium or tin, p is the valence of the cation, q has a value such that the ratio of q to p lies in the range 1:1 to 150:1, and w is an integer in the range from 0 to 260, which solid has a unit cell of hexagonal symmetry, the principal characteristics of which are:- a = 17.5 +/- 0.5 Angstrom, c = 85.6 +/- 0.5 Angstrom, and a unit cell volume = 22600 +/- 10 Angstrom<3>.
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