A novel hetropolyacid-based cation exchanger cerium(III) tungstosilicate was synthesized in amorphous form by mixing tungstosilisic acid (TSA) solutions to cerium(III) nitrate solutions at different Ce:TSA ratios. The materials were precipitated from the liquid phase by raising the pH of the solutions using sodium hydroxide. The produced ion exchange powders were characterized using powder X-ray diffractometry, thermogravimetry, infrared spectrometry, inductively coupled plasma and atomic absorption elemental analysis. The materials which were dried at 50 degrees C were found to be stable in water, dilute acids, alkaline solutions, and high temperature up to 1000 degrees C. The Ion exchange properties of the synthesized samples were studied by measuring the distribution coefficients (K-d) for 29 metal ions in demineralized water and nitric acid media. On the basis of Kd values, some quantitative separations such as Co2+-Pb2+, Cr3+-Zr4+, and Mo6+- W6+ are achieved on their columns.