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The title compound, tripotassium dialuminium arsenic-phosphorus (1,92/1,08) dodecaoxide, has been synthesized by solid-state reaction and characterized by single-crystal X-ray diffraction. The structure is a three-dimensional framework comprising corner-sharing tetrahedra. Six-, eight- and twelve-membered rings are formed. An analogy with the nasicon structure has been ruled out despite similarities in the formulae. The structure is compared to MIMIIXO4 compounds and tridymite.

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