• Media type: E-Article
  • Title: Generalized Pippard Equations
  • Contributor: Garland, Carl W.
  • Published: AIP Publishing, 1964
  • Published in: The Journal of Chemical Physics
  • Extent: 1005-1008
  • Language: English
  • DOI: 10.1063/1.1725997
  • ISSN: 0021-9606; 1089-7690
  • Keywords: Physical and Theoretical Chemistry ; General Physics and Astronomy
  • Abstract: <jats:p>The Pippard equations for α, CP, and βT near a λ-point transition have been generalized in terms of stress—strain variables. The resulting equations, which interrelate αi, sijT, and CP near a λ point, are tested with data on quartz near its α—β transition. A consequence of the new equations is the prediction that C′=(c11–c12)/2 should be constant for cubic crystals near a λ point; this prediction is compared with experimental data on ammonium chloride.</jats:p>
  • Description: <jats:p>The Pippard equations for α, CP, and βT near a λ-point transition have been generalized in terms of stress—strain variables. The resulting equations, which interrelate αi, sijT, and CP near a λ point, are tested with data on quartz near its α—β transition. A consequence of the new equations is the prediction that C′=(c11–c12)/2 should be constant for cubic crystals near a λ point; this prediction is compared with experimental data on ammonium chloride.</jats:p>
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