Phase diagram of CO<sub>2</sub> (<a href="https://en.wikipedia.org/wiki/carbon_dioxide" class="extiw" title="w:carbon dioxide">carbon dioxide</a>), suitable for international use.
<p>X axis is temperature in <a href="https://en.wikipedia.org/wiki/kelvin" class="extiw" title="w:kelvin">kelvin</a>; Y axis is pressure in <a href="https://en.wikipedia.org/wiki/bar_(unit)" class="extiw" title="w:bar (unit)">bar</a>.
</p><p>Legend:
</p>
<ul><li>1: solid phase</li>
<li>2: liquid phase</li>
<li>3: gas phase</li>
<li>4: supercritical fluid phase</li>
<li>A: triple point</li>
<li>B: critical point</li></ul>
<ul><li>Ben Finney</li>
<li>Mark Jacobs</li></ul>
Derived from <a href="//commons.wikimedia.org/wiki/File:Carbon_dioxide_pressure-temperature_phase_diagram.svg" title="File:Carbon dioxide pressure-temperature phase diagram.svg">Image:Carbon dioxide pressure-temperature phase diagram.svg</a>