Hi, I'm hoping to make small batches of synthetic minerals by compressing & heating small liquid or semi-liquid samples of sodium silicate w/ variable amounts of other salts dissolved within. As I understand it, many of these will require high pressure & temperature to form. So my strategy is to make some forced air, charcoal fired clay pot crucibles with room for sealed metal pipe sections with an internally threaded cap at one end that I can torque down prior to firing. (The liquid silicate solution goes in the pipe) That's the idea. Now my question, or series of related questions, begins with: Is there a specific law or shortcut I can use to calculate my initial pressure & consequent rise in fluid pressure as the temperature rises? I know there is a formula for computing pressure & density of gases at a specific pressure but as far as I know, it doesn't apply to compressed fluids. I admit I'm an amateur so if you see a flaw in the reasoning feel free to point it out. Also, my math skills are limited to linear algebra & trig.