Video/animation icon  Phase separation in solid solution upon cooling: laser beam projection

 
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Resource type: Video/animation
Description: As video 58, 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/tlplib/solid-solutions/demo.php
Keywords: solid solutions • phase separation
Categories: Science approaches
Science approaches > Phase transformations
Testing, analysis & experimentation
Created by: DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 09 August 2006
Date added: 02 December 2009
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Resource ID: 2359