1. A. S. Dixit, Reactor Engineering and Design Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, personal communication.
2. A. M. Azad, R. Pankajavalli andO. M. Sreedharan,J. Chem. Thermodynam. 18 (1986) 255.
3. F. A. Shunk (ed.), ?Consititution of Binary Alloys?, 2nd Supplement, (McGraw-Hill, New York, 1969) p. 570.
4. R. Pankajavalli, MSc thesis, Bombay University (1985).
5. O. Kubaschewski andC. B. Alcock, ?Metallurgical Thermochemistry?, 5th edition, (Pergamon Press, Oxford, 1983).