Phase equilibria
in the Ce–Ti–Sb and Gd–Ti–Sb ternary systems at 600°C
and the crystal structures of the Ce2Ti7Sb12
and Gd2Ti11Sb14 compounds
Chem.
Met. Alloys 10 (2017)
76-92
https://doi.org/10.30970/cma10.0359
Oleksandr SENCHUK, Yaroslav TOKAYCHUK, Roman SERKIZ, Pavlo DEMCHENKO, Roman GLADYSHEVSKII
The phase equilibria in the Ce–Ti–Sb and Gd–Ti–Sb ternary systems at 600°C were established by means of
X-ray powder diffraction and EDX analysis. The formation of two ternary
compounds in the Ce–Ti–Sb
system, Ce3TiSb5 (Hf5CuSn3 type)
and Ce2Ti7Sb12 (La2Ti7Sb12
type), and of one ternary compound in the Gd–Ti‑Sb system, Gd2Ti11Sb14 (Sm2Ti11Sb14
type), was confirmed. At 600°C, seven binary compounds were found to exist in
the Ti–Sb system, four in the Ce–Sb system, and four in the Gd–Sb system. No binary compounds form in the {Ce,Gd}–Ti systems. The crystal
structures of the Ce2Ti7Sb12 and Gd2Ti11Sb14
compounds were refined on X-ray powder diffraction data, starting from the
initial atomic parameters of the La2Ti7Sb12
and Sm2Ti11Sb14 structure types, respectively.
The isothermal sections of the phase diagrams of the Ce–Ti–Sb and Gd–Ti–Sb
ternary systems at 600°C were constructed in the whole concentration range.
Keywords
Cerium / Gadolinium /
Titanium / Antimony / Ternary compound / Phase diagram /