Title of article :
Disorder and phase transitions in oxyfluoride (NH4)3Ta(O2)2F4
Author/Authors :
Flerov، نويسنده , , I.N. and Gorev، نويسنده , , M.V. and Fokina، نويسنده , , V.D. and Bovina، نويسنده , , A.F. and Bogdanov، نويسنده , , E.V. and Pogoreltsev، نويسنده , , E.I. and Laptash، نويسنده , , N.M.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Abstract :
Calorimetric, X-ray, dielectric and DTA under pressure measurements have been performed on oxyfluoride (NH4)3Ta(O2)2F4. The succession of nonferroelectric phase transitions was found associated with the order-disorder processes. The comparative analysis tantalate with related niobate has revealed the important role of the central atom in the physical properties behavior, mechanism of structural distortions and barocaloric effect in oxyfluorides with the eight-coordinated anionic polyhedra.
Keywords :
Cubic oxyfluorides , entropy , permittivity , Pressure effect , structural disorder , Phase transitions
Journal title :
Journal of Fluorine Chemistry
Journal title :
Journal of Fluorine Chemistry
