Ordered films of tris-8-hydroxyquionolate-aluminum (Alq(3)) were grown by molecular beam deposition on cleaved KCl and KBr surfaces. The local molecular arrangements in the films were characterized by two-dimensional analysis of multiazimuth reflection medium energy electron diffraction (RMEED). A new type of curved one-dimensional crystallographic ordering was observed on KBr while a continuous point-on-line-type ordering was observed on KCl. Growth of the crystals consisting of mer isomers is suggested from the observed triple period superstructure.