Calculating Internal Energy of Solid CO2: How to Obtain Thermodynamic Values?

[hymeme]

I am doing a simple thermodynamic analysis. Couldn't get thermodynamic values (such as internal energy, exergy, and so on) from common data base of CO2. I looked it up in REFPROP(By NIST) and EES. None of them have data below 212K. At one atmosphere CO2 sublime at about 195K.
Could anyone explain this to me? How to calculate the internal energy and entropy when CO2 is in solid stae?
Thank you very much!

 

[CWatters]

Thermodynamics isn't my field but you can find things like the Specific Heat Capacity of C02 in the solid as well as data for phase changes (Latent Heat)..

http://en.wikipedia.org/wiki/Carbon_dioxide_data

 

[hymeme]

Thank you very much! I felt that it is kind strange that the properties of solid state are not included.