Solvothermal combinatorial chemistry affords the layered aluminophosphate (C2H8N)2[Al2(HPO4)(PO4)2]. The macroanionic layer is based on alternating AlO4 and PO4 tetrahedra linked through vertex oxygen atoms to form 4.8-net sheets, stacked in an ABCD sequence along the c axis. The (CH3)2NH2+ ions between the inorganic layers interact with the terminal PO groups to form left- and right-handed helices (see picture) along the b axis.
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Song et al. (2004) studied this question.
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