General concept of increasing crystal symmetry with an increase in temperature
- 19 November 2011
- journal article
- Published by Pleiades Publishing Ltd in Crystallography Reports
- Vol. 56 (6), 953-961
- https://doi.org/10.1134/s1063774511060083
Abstract
A general concept of the symmetry transformation of a material during its thermal expansion and final polymorphic transition is proposed based on numerous experimental data. Within this concept, the atomic nature of the transformation of the crystal structure with a change in temperature is considered. Particular attention is paid to the thermal expansion of materials, along with the well-known tendency of a thermally induced increase in the crystal symmetry, which is generally considered to be the directionality of material transformation during polymorphic transitions.Keywords
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