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TDPAC study on the thermal stability of zirconium tetrafluoride
Authors:P. C. Rivas  M. C. Caracoche  J. A. Martínez  M. T. Dova  A. R. López García
Affiliation:(1) Departemento de Fisica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 67, 1900 La Plata, Argentina;(2) Present address: Carrera del Personal de Apoyo a la Investigacion y Desarrollo, CONICET, Argentina;(3) Present address: Carrera del Investigador Cientifico, CICPBA, Argentina;(4) Present address: CONICET, Argentina;(5) Present address: Carrera del Investigador Cientifico, CONICET, Argentina
Abstract:
The thermal evolution of the hyperfine interaction in α-ZrF4 is investigated between 293 K and 788 K. The first change, observed ay 534 K, is attributed to the appearance of the non-stoichiometric compound ZrO1.3F1.4. During the transformation, the relative fraction of the latter shows an Arrhenius behaviour with an activation energyE a=(22.6±5.5) kJ/mol. At approximately 700 K, ZrO1.3F1.4 gives rise to the monoclinic phase of ZrO2 and to β-ZrF4.
Keywords:
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