PHYSICOCHEMICAL AND STRUCTURAL INVESTIGATIONS ON MATERIALS

X-ray diffraction data have been used to construct the 1070 K isothermal section of the Lu ― V ― B phase diagram. The solubility of VB₂in LuB₂attains 5 at.% lattice parameters of the Lu, VB₂phase of the limiting composition with the AlB₂structure are a 0.3238 1,c 0.3689 1 nm. A new ternary boride has been discovered, Lu_1.34V_1.66B₆,which belongs to the Y₂ReB₆structure type space groupPbam, a = 0.8947 8, b= 1.12737, c= 0.3381 2 nm, F_hkl> 4σF,2thetav;_max= 72.76°, N_hkl= 379, R_F= 0.0617, R_w= 0.0653) and is characterized by a statistical distribution of the Lu and V atoms in one of the structure positions.