1. L. P. Cook and H. F. McMurdie,Phase Diagrams for Ceramists, VII:5, American Ceramics Society, Westerville, OH (1989).
2. Unpublished data, Argonne National Laboratory, Idaho Falls, ID (1993).
3. Engineered Materials Handbook, Vol. 4, Ceramics and Glasses, ASM International, Metals Park, OH (1991).
4. Unpublished data, Argonne National Laboratory, Idaho Falls, ID (1996).