Thermal and mechanical properties of AgPb9(VO4)6I and AgBa9(VO4)6I

AgPb9(VO4)6I and AgBa9(VO4)6I were synthesized as a potential waste form to immobilize radioactive iodine. The thermal and mechanical properties such as the Young’s modulus and thermal conductivity were measured. The crystal systems of AgBa9(VO4)6I and AgPb9(VO4)6I are rhombohedral and monoclinic, respectively. They are stable up to 950 K under Ar atmosphere. The thermal conductivity of the samples is less than 1.0 W m-1 K-1, which is lower than that of borosilicate glasses used for high-level nuclear waste forms. [Copyright &y& Elsevier]