ln(P₂/P₁) = −(L/R)·(1/T₂ − 1/T₁): condensation-T curves for refractories

Clausius-Clapeyron relation in its integrated form (Clausius 1850, Clapeyron 1834): for a single-component phase boundary with latent heat L approximately constant over the relevant temperature range, ln(P₂/P₁) = −(L/R)·(1/T₂ − 1/T₁). …