HfW2O8 is rapid synthesized by CO2 laser.The results of XRD and Raman spectra show that the samples contain single cubic phase with minor contents of orthorhombic phase.This is explained by a compressive stress induced during the rapid solidification process due to a sudden drop of temperature from the molten pool to the ambient.The stress is estimated to be about 0.6 GPa by the comparison with high pressure Raman study.The SEM observations show that the sample is composed of nanostructures which grow horiz...