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Unidimensional triangular-shaped channels lined by methyl groups are the characteristic features of the novel aluminophosphonate Al2(CH3PO3)3 (space-filling model shown on the right). The inorganic framework contains 18-rings composed of AlO4 tetrahedra, AlO6 octahedra, and CH3PO3 tetrahedra.
Maeda et al. (Fri,) studied this question.