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Phase separation in solid solution upon cooling: laser beam projection

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Uploaded on Dec 22, 2009

As video "Phase separation in solid solution upon cooling: vial projection", but filmed looking into the laser light after it has passed through the vial (i.e. the video is of the laser beam as projected onto a screen): The vial contains a mixture of cyclohexane and aniline cooling from 35┬║. When the critical temperature is reached and the mixture goes from a single phase to two phases, the spot of light on the screen is disrupted as the phases separate. The spot 'flickers' and then becomes totally diffuse. It will eventually form a single spot again once the transition is completed and the two chemicals have completely separated. From TLP: Solid Solutions (speeded up by a factor of about 200) http://www.msm.cam.ac.uk/doitpoms/tlp... Courtesy of DoITPoMS, The University of Cambridge. Released under Creative Commons Attribution-Non-Commercial-Share Alike licence http://creativecommons.org/licenses/b...

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