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2001
equilibria
E 4000
16 - 015
equilibria
Phase Diagram of the Ca–Sn System. — The phase diagram of the title
system is determined over the whole composition range. Seven intermediate
phases are identified including the three new phases Ca7 Sn6 (I), Ca36 Sn23 (II),
and Ca5 Sn3 (III). As revealed by single crystal and powder XRD, compound
(I) crystallizes in the orthorhombic space group Pnma with Z = 4, (II) in
the tetragonal space group P4/mbm with Z = 2, and (III) in the tetragonal
space group I4/mcm. The phase diagram contains four eutectic points: at
about 5 at.% Sn and 780 ◦ C, 48 at.% Sn and 995 ◦ C, 68 at.% Sn and 610 ◦ C,
and at ¡1 at.% Ca and 225 ◦ C. — (PALENZONA, A.; MANFRINETTI, P.;
FORNASINI, M. L.; J. Alloys Compd. 312 (2000) 1-2, 165-171; Dip. Chim.,
Univ. Genova, I-16146 Genova, Italy; EN)
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