Structural characterization, thermal, vibrational properties and molecular motions in perovskite-type diaminopropanetetrachlorocadmate NH3(CH2)3NH3CdCl4 crystal

The work presents a detailed analysis of the sequencing of the structural phase transitions in NH3(CH2)3NH3CdCl4 crystal by differential scanning calorimetry (DSC), X-ray, infrared, far infrared and Raman spectroscopy. DSC studies have shown that in analyzed crystal occurring one reversible continuo...

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 2014-12, Vol.75 (12), p.1305-1317
Main Authors: Staśkiewicz, B., Turowska-Tyrk, I., Baran, J., Górecki, Cz, Czapla, Z.
Format: Article
Language:English
Subjects:
A. Inorganic compounds
A. Organic compounds
C. Infrared spectroscopy
D. Crystal structure
D. Phase transitions
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Summary:The work presents a detailed analysis of the sequencing of the structural phase transitions in NH3(CH2)3NH3CdCl4 crystal by differential scanning calorimetry (DSC), X-ray, infrared, far infrared and Raman spectroscopy. DSC studies have shown that in analyzed crystal occurring one reversible continuous phase transition at 375/374K (on heating/cooling). Observed in Nujol and Fluorolube mulls in the wide temperature range between 296K and 413K spectral changes through the structural phase transition can be attributed to an onset of motion of cations. An assignment of some bands due to internal modes has been also proposed. •Phase transitions in layered compound has been studied by different measurements.•Wide temperature range vibrational analyses have been done.•Cationic contribution to the phase transition mechanism was confirmed.•The one reversible continuous phase transition was evident.
ISSN:0022-3697
1879-2553
DOI:10.1016/j.jpcs.2014.07.004