New binary compounds in the LuNi system

 

Chem. Met. Alloys 4 (2011) 89-93

 

L. ROMAKA, V. ROMAKA, Yu. STADNYK

 

The binary system LuNi was studied by means of X-ray powder diffraction and metallographic analysis in the whole concentration range. The presence of Lu2Ni17 (Th2Ni17 type), LuNi5 (CaCu5 type), LuNi4 (own type), LuNi2 (MgCu2 type), and LuNi (FeB type) was confirmed and three new binary compounds, LuNi3 (PuNi3 type), Lu3Ni2 (Er3Ni2 type) and Lu3Ni (Fe3C type), were found. The crystal structures of the latter were refined to RBragg = 0.03-0.04. Electronic structure calculations performed for Lu3Ni confirmed the metallic character of the bonding, with some additional electron density between Lu and Ni atoms.

 

 

Coordination polyhedrons of the Ni atoms in the structure of Lu3Ni

 

 

Keywords

Intermetallics / Crystal structure / X-ray diffraction / Electronic structure / Bonding