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Can Solids That Thermally Decompose Exist As Liquids Etc. At Certain Pressures?

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.

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New Contributor II

Re: Can Solids That Thermally Decompose Exist As Liquids Etc. At Certain Pressures?

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.

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