@conference {509, title = {Framework ordering in aluminophosphate molecular sieves studied by (27)Al double rotation NMR}, volume = {69}, year = {1991}, month = {1991}, pages = {435-442}, publisher = {Elsevier}, organization = {Elsevier}, author = {Chmelka, B.F. and Wu, Y. and Jelinek, R. and Davis, M.E. and Pines, A.}, editor = {P.A. Jacobs, N.I. Jaeger, L. Kubelkova, and B. Wichterlov} }