Sodium benzolyacetonate has not been studied by X-ray diffraction methods. There is no X-ray information on their inter-planer spacings and lattice dimensions. Sodium benzoglacetonate showed anomalous electrical proper-ties when heated at 90 X-ray powder diffraction methods wer8 used to study the original sample and the new phase formed at W. The lattice spacings and the geometry of the two crystals before and after heating were evaluated. The results showed that crystals of sodium benzoylacetoeate are monoclinic while the crystals of the preheated sample at 90 are triclinic.