%0 Conference Paper %D 1991 %T Framework ordering in aluminophosphate molecular sieves studied by (27)Al double rotation NMR %A Chmelka, B.F. %A Wu, Y. %A Jelinek, R. %A Davis, M.E. %A Pines, A. %E P.A. Jacobs, N.I. Jaeger, L. Kubelkova, and B. Wichterlov %I Elsevier %V 69 %P 435-442 %8 1991 %G eng