THE PROJECTION OF LIQUIDUS SURFACE OF TRIPLE SYSTEM Gd–Bi–S

For the first time using methods of physical-chemical analysis the triple system Gd-Bi-S has been examined and its liquids surface projection constructed. The formation of 3 triple compounds of Gd₄Bi₂S₉ , GdBiS and GdBiS₃ composition being formed under perictectic reaction at 1100, 840 and 930_oC established.