Fig. 4: The chemical potentials of carbon and hydrogen in C/H mixtures at different temperature and pressure conditions.
From: Thermodynamics of diamond formation from hydrocarbon mixtures in planets
The chemical potentials per carbon atom in C/H mixtures calculated using the S0 method are shown as blue crosses connected by solid curves, the values obtained using the coexistence method are shown as blue hollow symbols connected by dotted curves, and the ideal solution approximation is indicated by blue dashed curves. The chemical potentials per hydrogen atom calculated using the S0 method are shown as orange crosses. The error bars show the standard mean errors. The chemical potential of diamond is indicated by the black diamond symbol and the black horizontal line.
