I read an article a while ago about the discovery that sucrose didn't melt, it thermally decomposed and it got me thinking about phase diagrams to see if this was tru for all pressures. Unfortunately I can't find a good database of pressure vs. temp. phase diagrams, even for well known thermally decomposing salts like calcium carbonate or lead (II) nitrate.
Any help is appreciated.
I think it would help to pursue "triple point" as a topic.
The triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.