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SUMMARY:Accentuate the negative: anomalous thermal expansion in cyanide fr
 ameworks - Anthony E. Phillips\, SMF Group\, Cavendish Laboratory
DTSTART:20080522T150000Z
DTEND:20080522T153000Z
UID:TALK11248@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:X-ray diffraction is one of the most powerful methods availabl
 e for probing the structures of materials. Recent developments have made i
 t possible to modify the temperature or pressure over the course of an exp
 eriment\, allowing the response to these changes to be monitored to atomic
  resolution. I have used this technique to investigate the unusual and ind
 ustrially useful phenomenon of negative thermal expansion (i.e.\,\na decre
 ase in volume upon heating) in a family of cyanide-bridged frameworks. The
 se include a newly discovered polymorph of cadmium cyanide which displays 
 the largest isotropic negative thermal expansion currently known.
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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