Thermodynamic properties and phase transitions of Tutton salt (NH4)2Co(SO4)2·6H2O crystals

@article{Lim2011ThermodynamicPA,
  title={Thermodynamic properties and phase transitions of Tutton salt (NH4)2Co(SO4)2·6H2O crystals},
  author={Ae Ran Lim},
  journal={Journal of Thermal Analysis and Calorimetry},
  year={2011},
  volume={109},
  pages={1619-1623}
}
  • A. Lim
  • Published 1 September 2012
  • Chemistry
  • Journal of Thermal Analysis and Calorimetry
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… 

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Comments concerning “Thermodynamic properties and phase transitions of Tutton salt (NH4)2Co(SO4)2·6H2O crystals”
  • K. Lee
  • Materials Science
    Journal of Thermal Analysis and Calorimetry
  • 2013
To the Editor In a recent article appearing in this Journal, Lim [1] reported differential scanning calorimetry (DSC), thermogravimetry (TG), and nuclear magnetic resonance of Tutton salt
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The NMR spectrum, spin–lattice relaxation times, T1, and the spin–spin relaxation times, T2, for the 23Na and 87Rb nuclei in Tutton salts Na2Zn(SO4)2·6H2O and Rb2Zn(SO4)2·6H2O single crystals were
Thermodynamic properties and phase transitions of salt hydrates between 270 and 400 K I. NH4Al(SO4)2 · 12H2O, KAl(SO4)2 · 12H2O, Al2(SO4)3 · 17H2O, ZnSO4 · 7H2O, Na2SO4 · 10H2O, and Na2S2O3 · 5H2O
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The host lattice influence on the Jahn-Teller effect of the Cu(H2O)62+ complex studied by EPR in K2Zn(SO4)2.6H2O and (NH4)2Zn(SO4)2.6H2O Tutton salt crystals
The EPR investigations of Cu2+ doped K2Zn(SO4)2.6(H2O) and (NH4)2Zn(SO4)2.6(H2O) Tutton salts in a temperature range of 4.2-300 K are reported. The analysis of the temperature dependences of the
Electron spin relaxation of vibronic Cu(H2O)6 complexes in K2Zn(SO4)2·6H2O single crystals
The low temperature (6 K) EPR spectrum of Cu2+ in K2Zn(SO4)26H2O is characteristic for the ground state a|x2-y2-b|z2 with essentially the |x2-y2 state and 4.5% admixture of the |z2 state due to the
Theoretical explanation of EPR parameters for Cr3+ in (NH4)2Co(SO4)2 crystal
Abstract The g factor and zero-field splitting parameter D for Cr 3+ in (NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O crystal is calculated from a high-order perturbation formula. The calculated result shows very
Electron paramagnetic resonance study of Cr3+ ions in (NH4)2Co(SO4)2·6H2O single crystal
Abstract The EPR of Cr 3+ ions in ammonium cobalt sulphate hexahydrate, (NH 4 ) 2 Co(SO 4 ) 2 ·6H 2 O, single crystal have been studied at room temperature at Q band frequency. Cr 3+ ion replaces Co
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Electron paramagnetic resonance of Mn2+ in Cs2M(SO4)2s6H2O (M = Mg, Zn, Co, Ni) single crystals
Abstract X-band electron paramagnetic resonance measurements are reported on single crystals of Cs 2 M(SO 4 ) 2 s6H 2 O (M = Mg, Zn, Co, Ni) doped with Mn 2+ ions at 290 K and 77K. Mn 2+ substitutes
EPR of VO2+ in Cd(NH4)2(SO4)2 · 6H2O and Mg(NH4)2(SO4)2 · 6H2O single crystals
Abstract Detailed X-band electron paramagnetic resonance (EPR) studies of the VO2+ ion have been carried out in the single crystals of Tutton salts Cd(NH4)2(SO4)2·6H2O (CASH) and Mg(NH4)2(SO4)2·6H2O
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