The ternary Eu-Cu-Si system at 400°C

Chem. Met. Alloys 1 (2008) 343-347

https://doi.org/10.30970/cma1.0077

Bohdana BELAN, Mykola MANYAKO, Roman GLADYSHEVSKII

Based on X-ray diffraction and microstructure analysis the isothermal section at 400°C of the phase diagram of the system Eu-Cu-Si was built. The compound EuCu₂Si₂ (CeAl₂Ga₂ structure type) was confirmed and its homogeneity region was determined (EuCu_2.25-1.50Si_1.75-2.50). The compound EuCu_0.80-0.20Si_1.20-1.80 (AlB₂ structure type) is also characterized by a variable content of copper and silicon. In addition, four new compounds with unknown structure were found in this system. The effective valence of europium was studied.

Isothermal section of the phase diagram of the Eu-Cu-Si system at 400°C.

Keywords

Isothermal section / Crystal structure / Effective valence