Hi Abdul, On Mon, May 21, 2018 at 3:24 PM Abdul Ahad wrote:

Hi all, I have little confusion that do i fix or change S2 for each data set measured at different temperature. The compound is not monoatomic so i used Einstein model for sigma2. What about amplitude S2. ​'

​Generally speaking, S02 is independent of temperature, at least for a system that is not changing state. That is, S02 is essentially an atomic property. If you melt a material, you'll first change the coordination number. Eventually (say 10,000 K) you might get to the point where you're moving electrons out of the atom, and in a plasma, S02 may not be the same as for low temperatures. But, when your sample is in a solid or liquid state, S02 should not depend on temperature. --Matt