Grown for the first time are KH2PO4 (KDP) crystals with incorporated aluminium oxyhydroxide Al2O3 center dot nH(2)O nanoparticles (n = 3.5-3.6). The influence of the nanoparticles on the structure perfection and the growth kinetics of the crystal faces are studied. The presence of the nanoparticles in the crystal matrix is confirmed by the results of chemical analysis, X-ray diffraction (XRD) analysis and transmission electron microscopy (TEM). The most essential inhibiting effect of the nanoparticles is observed for the {100} faces. The mechanism of influence of the nanoparticles on the {100} faces growth is explained on the base of the Cabrera-Vermilyea (C-V) model using Langmuir adsorption isotherm. (C) 2012 Elsevier B.V. All rights reserved.