Interaction of the components in the system LuAgGe at 500

 

Chem. Met. Alloys 11 (2018) 1-5

 

Bohdana Belan, Mykola Manyako, Roman Gladyshevskii

 

The isothermal section of the phase diagram of the LuAgGe system at 500 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 LuAg and LuGe 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 LuAgGe system at 500.

 

Keywords

Lutetium / Silver / Germanium / Phase diagram / Crystal structure / Ternary compound