Cohesive energy density Vs surface energ

Hi everyone,

- is it possible to relate cohesive energy density (CED) to surface energy (gamma), or are they calculated completely differently ?

- I understand that the values of CED is calibrated experimentally. What I am trying to do now is to find an estimation range for CED to some pharmaceutical powder. So, is it possible to find some of these values directly somewhere or do I need to do some experiments before I can use this model for my powder ?

Thanks in advance,

Luton