The relationship between temperature, pressure, and the phase of a substance can be represented using a phase diagram.

Phase diagrams can be complex; sometimes several different condensed phases are possible for a substance. For example, diamond and graphite are different possible phases for the element carbon.

Solids have vapor pressures. The vapor pressure curves have shapes like those of liquids. They are a bit steeper.

At temperatures below the melting temperature, the vapor pressure of the solid is lower than that of the liquid. Above the melting temperature, the vapor pressure of the solid is higher than that of the liquid.

Idaho site for phase diagrams.