Author: Ae Ran Lim 1
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  • 1 Department of Science Education, Jeonju University, Jeonju 560-759, Korea
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Abstract

The thermodynamic properties and phase transitions of Tutton salt (NH4)2Co(SO4)2·6H2O single crystals were investigated with TG, DSC, and NMR. The first mass loss occurs in the vicinity of 360 K (Td), which is interpreted as the onset of partial thermal decomposition. Phase transitions were found at 384 K = TC1, 415 K = TC2, and 443 K = TC3. The temperature dependence of the spin–lattice relaxation time, T1, for the H nuclei undergoes slight changes near TC1 and TC2. These changes are associated with changes in the geometry of the arrangement of water and five SO4 oxygens and with proton hopping or the breaking of hydrogen bonds.

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  • SJR Quartile Score (2018): Q2 Condensed Matter Physics
  • SJR Quartile Score (2018): Q2 Physical and Theoretical Chemistry

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
4
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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