Volume 77, Number 5, March 2007
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||15 February 2007|
Landau theory applied to phase transitions in calcium orthotungstate and isostructural compounds
Departamento de Física Aplicada-ICMUV, Universitat de València - Edificio de Investigación, c/Dr. Moliner 50, 46100 Burjassot (Valencia), Spain
Corresponding author: firstname.lastname@example.org
Accepted: 3 January 2007
The pressure-driven tetragonal-to-monoclinic phase transition in and related scheelite-structured orthotungstates is analysed in terms of spontaneous strains. Based upon our previous high-pressure X-ray diffraction results and the Landau theory, it is suggested that the scheelite-to-fergusonite transition is of second order in nature.
PACS: 61.50.Ks – Crystallographic aspects of phase transformations; pressure effects / 62.50.+p – High-pressure and shock wave effects in solids and liquids / 64.70.Kb – Solid-solid transitions
© Europhysics Letters Association, 2007
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