The anti-radiation stability and chemical stability of solid solution of sphene that was synthesized using CaCO3, TiO2, H2SiO3, Nd2O3 and Al2O3 as raw materials through solid-state reaction were studied by the leaching and irradiation experiments and by the means of XRD, SEM,EDS, AAS,FS,LRS and IR analysis. The results indicated that the sphene synroc has a good anti radiation stability and chemical stability. When the cumulative radiation dose of 60Co was 5.76×105 Gy, it did not result in the lattice of radiation damage. When the pH was 7 at 90 ℃, the nominalized leach rate of Ca2+, Ti4+ and Nd3+(42 d) were 6.32×10-3, 3.9×10-5 and 5.38×10-3 g/(m2·d) separately.
