Interaction of the components
in the system Lu–Ag–Ge at 500°Ñ
Chem.
Met. Alloys 11 (2018) 1-5
https://doi.org/10.30970/cma11.0376
Bohdana Belan, Mykola Manyako,
Roman Gladyshevskii
The isothermal section of the phase diagram of
the Lu–Ag–Ge system at 500°Ñ was investigated based
on X‑ray diffraction and microstructure analysis. The binary compound
LuAg2 (structure type MoSi2, Pearson symbol tI6,
space group I4/mmm) was found to dissolve up to 20 at.%
Ge: a = 3.6297(6)-3.6292(6),
c = 9.191(7)-9.2341(7) Å. The other binary compounds of the Lu–Ag and Lu–Ge systems dissolve not more than 5 at.% of the third component. The ternary compound LuAgGe (structure type ZrNiAl, Pearson
symbol hP9, space group P-62m,
a = 7.0677(4), c = 4.1665(3) Å) was confirmed. An additional, new phase with
unknown structure was observed in an alloy of nominal composition Lu52Ag9Ge39.
Isothermal section of the phase
diagram of the Lu–Ag–Ge system at 500°Ñ.
Keywords
Lutetium /
Silver / Germanium / Phase diagram / Crystal structure / Ternary compound