Contribution to the investigation of the ternary LuCuSn system

 

Chem. Met. Alloys 1 (2008) 192-197

 

L. ROMAKA, V.V. ROMAKA, V. DAVYDOV

 

A detailed study of the Lu-Cu-Sn ternary system was performed in the composition range CuLuCu5LuCuSnSn at 670 K. The crystal structure of two previously unknown stannides formed in this region was determined using X-ray powder diffraction. The Lu1.8Cu9.2Sn2.8 compound crystallizes in the Dy1.9Cu9.2Sn2.8 structure type (space group P63/mmc), whereas the Lu3Cu4Sn4 stannide belongs to the Tm3Cu4Sn4 structure type (space group C2/m). The formation of a substitutional solid solution LuCu5-xSnx up to 15 at.% Sn was observed.

 

A model of the crystal structure of the Lu3Cu4Sn4 compound (SG C2/m).

 

Keywords

Stannides / Phase diagrams / Crystal structure / X-ray powder diffraction