The ternary Eu-Cu-Si system at 400C

 

Chem. Met. Alloys 1 (2008) 343-347

 

Bohdana BELAN, Mykola MANYAKO, Roman GLADYSHEVSKII

 

Based on X-ray diffraction and microstructure analysis the isothermal section at 400C 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 (EuCu2.25-1.50Si1.75-2.50). The compound EuCu0.80-0.20Si1.20-1.80 (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 400C.

 

Keywords

Isothermal section / Crystal structure / Effective valence