triple point

A Dictionary of Earth Sciences | 1999 | 411 words | Copyright

triple point The point on a phase diagram at which planes or phases meet. This is the temperature and pressure at which the three phases (solid, liquid, and gas) of a substance can coexist (see also KELVIN SCALE). In a solid-solution system, the triple point is usually defined by the original pressure and temperature conditions at which the solid, liquid, and gaseous phases of a substance are in equilibrium.

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AILSA ALLABY and MICHAEL ALLABY. "triple point." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

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AILSA ALLABY and MICHAEL ALLABY. "triple point." A Dictionary of Earth Sciences. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-triplepoint.html

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