On the Structural Phase Transition in a Perovskite-Type Diaminopropanetetrachlorocuprate(II) NH₃(CH₂)₃NH₃CuCl₄ Crystal

• Authors: O. Czupiński , A. Ingram , M. Kostrzewa , J. Przesławski , Z. Czapla
• Languages of publication: EN

Abstracts

EN

Chemical preparation, differential scanning calorimetry and thermal stability differential thermal gravimetry studies, positron annihilation lifetime investigations, optical observations as well as electric properties of the NH₃(CH₂)₃NH₃CuCl₄ crystal are presented. On the basis of the differential scanning calorimetry response the structural phase transition of the first order was observed at 436 K. The enthalpy and entropy of the phase transition are equal to 1120 J/mol and 2.57 J/(mol K), respectively. Differential thermal analysis and thermogravimetric analysis studies confirmed the phase transition at 436 K and one can conclude the chemical and thermal stability of the compound up to about 480 K. Optical observations showed a continuous change of colour from yellow to dark brown above the phase transition to 436 K. Dielectric measurements showed a significant increase of conductivity upon approaching the phase transition regions, with a significant increase above the phase transition temperature. An activation energy dependent on the temperature range, and different for each particular phase, is obtained from measurements of complex impedance.

Keywords

EN

62.20.D-; 77.22.Gm; 78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 77.22.Gm: Dielectric loss and relaxation
• 62.20.D-: Elasticity(for materials treatment effects on elastic properties, see 81.40.Jj)

• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 2
• Pages: 304-310

Dates

published

2017-02

received

2016-12-13

(unknown)

2017-02-11

Contributors

author

O. Czupiński

• Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland

author

A. Ingram

• Department of Physics, Opole University of Technology, Ozimska 75, 45-271 Opole, Poland

author

M. Kostrzewa

• Department of Physics, Opole University of Technology, Ozimska 75, 45-271 Opole, Poland

author

J. Przesławski

• Institute of Experimental Physics, University of Wrocław, Pl. M. Borna 9, 50-204 Wrocław, Poland

author

Z. Czapla

• Department of Physics, Opole University of Technology, Ozimska 75, 45-271 Opole, Poland
• Institute of Experimental Physics, University of Wrocław, Pl. M. Borna 9, 50-204 Wrocław, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.131.304