1. G. Brauer, ?Handbook of Preparative Inorganic Chemistry? (Academic Press, New York, 1965) p. 1521.
2. M. Figlarz, F. Vincent, C. Lecaille andJ. Amiel,Powder Technol. 1 (1967) 121.
3. M. Figlarz andF. Vincent,Compt. Rend. Acad. Sci. (Paris) 266 (1968) 376;F. Vincent, M. Figlarz andJ. Amiel, in ?6th Int. Symp. Reactiv Solids, Schenectady, 1968? (edited by J. W. Mitchell, R. C. Devries, R. W. Roberts and P. Cannon) (Wiley-Interscience, New York, 1969) p. 181.
4. Yu. D. Kondrashev andN. N. Fedorova,Dokl. Akad. Nauk SSSR 94 (1954) 229.
5. R. Ammann, W. Feitknecht andR. Giovanoli, in ?7th Congr. Int. Microsc. Electron., Grenoble, 1970? (edited by P. Favard) (Soc. FranÇ. Microsc. Electron., Paris, 1970) Vol. 1, p. 467.