The solubilities and refractive indexes of saturated solutions of title systmes (at 25℃) have been investigated and the corresponding equlibrium diagrams was constructed. When M=Li, there are 3 solid phases in the system: LiCl.0.5HOAc, LiCl, SbCl~3. While M=Na, the system belongs to simple eutectic type and any new phases were not discovered. This work and systems on M=K, NH~4, Rb, Cs presents a profitable typical system for distinguish of different behaviour between alkali metal cations M^+.

Key words: TERNARY SYSTEM, REFRACTIVE INDEX, LITHIUM CHLORIDE, SODIUM CHLORIDE, ANTIMONY BUTTER, ACETIC ACID