The hydrothermal synthesis of ZnAPO-34 films supported on alumina substrates was reported in this paper. Synthesis parameters of the films were extensively examined. Organic content, water content, alumina source, and supports played important roles in the syntheses of ZnAPO-34 films. The best synthesis composition was found to be 0.4ZnO:0.8Al(2)O(3):1P(2)O(5):2TEAOH:225-550H(2)O with aluminum isopropoxide as alumina source. However, repeated syntheses were necessary to synthesize contineous ZnAPO-34 films on both nonporous an porous alumina supports. (C) 2003 Kluwer Academic Publishers.