Landelli, Aldo and Palenzona, Andrea:
Sulla struttura dei composti intermetallici delle terre rare di formula MSn2
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Serie 8 40 (1966), fasc. n.4, p. 623-628, (Italian)
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The micrographic and X-ray examination of the richest tin part of the rare earths-tin systems showed the existence, from La to Lu, of a stable phase corresponding to the MX3 composition, while for the following elements (including Y) a phase with the formula MSn2 becomes stable. Eu and Yb behave differently, because of their divalency. The structure has been determined, from GdSn2 to LuSn, by single crystal X-ray analyses, finding the orthorhombic ZrSi2 type. For the first r.e. (La, Ce, Pr, Nd, Sm) this phase appears not to be stable and for the system Ce-Sn the composition Ce3Sn7 and Ce2Sn5 have been found as homogeneous ones. Lattice constant values are reported with a discussion of the existence range and structure type for the MX2 compounds of the r.e. with Si, Ge, Sn.
Referenze Bibliografiche
[1] I. R. HARRIS e G. V. RAYNOR, «Journ. Less Common Metals», 9, 7 (1965).
[2] W. B. PEARSON, Lattice sfacings and structures of metals and alloys, Pergamon Press, 1958.
[3] K. A. GSCHNEIDNER Jr., Rare Earths alloys, D. van Nostrand, 1961.
[4] E. PARTHÉ, Colloque international sur les derivés semimetalliques, Paris 1965 (in corso di stampa).
[5] E. I. GLADISHEWSKIJ, «Zhurn. Strukt. Khim.», 5, 568 (1964).
[6] O. D. MCMASTERS e K. A. GSCHNEIDNER Jr., «Nuclear Metallurgy Series», 10, 93 (1964).
[7] G. S. SMITH, Q. JOHNSON e A. G. THARP, «Acta Cryst.», 18, 1085 (1965).
Con il contributo del Ministero per i Beni e le Attività Culturali