Topics in this session will address new developments and innovative applications for materials and materials processing methods for the immobilization of nuclear and hazardous wastes. Progress in the processing and testing of materials for immobilization is critical to the efficient and safe treatment and disposition of nuclear wastes around the world. This session will focus on synthesis, characterization, testing, and modeling techniques that quantify and allow understanding of waste form behavior. Materials of interest may include glass, ceramics, glass-ceramics, and other composite matrices.