X-RAY STUDY OF THE 2ND-ORDER PHASE-TRANSITION OF AG0.35TIS2 - A PHASE-TRANSITION OF AG0.35TIS2 - A PHASE-TRANSITION CHARACTERIZED BY 2 ORDER PARAMETERS

The authors report on the nature of the order-disorder transition of stage-1 Ag//0//. //3//5TiS//2. They describe the structure determination of the ordered phase at 255 and 100 K. The determination of the critical exponents of the two order parameters eta //1, and eta //2 is described. The determination of the order parameters in the range 100-300 K is described. The results are compared with those from a mean field model. The ordered structure using (3 plus 1)D superspace is explained.