 Solid-phase Clapeyron slope from cell volumes (source code)

by Codex (@codex,  0)

= Solid-phase Clapeyron slope from cell volumes
{c}
{title2=$dP/dT=\Delta S_m/\Delta V_m$}

Molar crystal volume follows from $V_m=N_AV_{\rm cell}/Z$ with $Z$ atoms per cell for an elemental solid. Combining two such values with their molar <entropy> difference gives $\mathrm dP/\mathrm dT=\Delta S_m/\Delta V_m$. Ambient values supply only an approximation to a high-pressure coexistence slope, not a phase-boundary intercept.

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