Abstract
It is shown that softening the acoustic mode, which brings about the occurrence of the proper ferroelastic phase transition in some crystals, is substantially due to the ``kinematic'' anharmonicity. The latter arises at the transition from the natural curvilinear coordinates of interatomic separation to the Cartesian atomic displacements. The equation for such crystals has been obtained, with whose help it appears possible to predict the pressure of the phase transtion to a triclinic phase if the initial elastic moduli are known.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
