Investigations on the growth and characterisation of an isomorphous ammonium tetroxalate dihydrate superacid crystal

Investigations on the growth and characterisation of an isomorphous ammonium tetroxalate dihydrate superacid crystal

Single crystals of ammonium tetroxalate dihydrate (ATOXAL) were grown by the slow evaporation solution growth technique. The crystal structure was confirmed by single crystal XRD analysis. The functional groups present were explored and ammonium ion reveals its group frequency at 1404cm−1 and 1489cm...

Full description

Saved in:
Bibliographic Details
Published in:Optik (Stuttgart) Vol. 127; no. 9; pp. 3896 - 3904
Main Authors: Jerusha, Eunice, Kumar, R. Infant Shyam, Kirupavathy, S. Shahil, Gopalakrishnan, R.
Format: Journal Article
Language:English
Published: Elsevier GmbH 01-05-2016
Subjects:
Anomalies
Crystal growth
Crystal structure
Crystals
Dielectric constant
Differential scanning calorimetry (DSC)
Electron microscopy
Ferroelectricity
Micrographs
Microhardness
Photoconductivity
Single crystals
X-ray diffraction
Crystal growth
X-ray diffraction
Differential scanning calorimetry (DSC)
Ferroelectricity
Electron microscopy
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Single crystals of ammonium tetroxalate dihydrate (ATOXAL) were grown by the slow evaporation solution growth technique. The crystal structure was confirmed by single crystal XRD analysis. The functional groups present were explored and ammonium ion reveals its group frequency at 1404cm−1 and 1489cm−1 respectively from the recorded FT-IR and FT-Raman spectra. Microhardness studies were carried out with the Vicker's microhardness tester. The TG, DTA and DSC studies divulged information about thermal behaviour. The HOPM studies supported the thermal anomalies in the crystal. The density was evaluated to be 1.639g/cc. The optical behaviour was examined with DRS, UV–vis, photoluminescence and photoconductivity studies. The optical band gap was assessed to be 3.963eV. Negative photoconductivity was exhibited. SEM micrographs showed the purity and crystalline nature of the grown crystals. Dielectric anomalies are seen in the variation of the dielectric constant with temperature suggesting the ferroelectric nature of the crystal.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2016.01.091