Spin‐Lattice Relaxation and Self‐Diffusion Study of the Protonic Superionic Conductors CsHSeO<sub>4</sub> and CsHSO<sub>4</sub>

Blinc, R.; Dolinšek, J.; Lahajnar, G.; Zupančić, I.; Shuvalov, L. A.; Баранов, А. І.

doi:10.1002/pssb.2221230159

Cited by 103 publications

(51 citation statements)

References 5 publications

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“…The main contribution to conductivity comes from deuterium, an assumption confirmed by the anomalously large temperature factor for these atoms and also supported by optical spectroscopy (Dmitriev, Loshkarev, Rabkin, Shuvalov & Yuzyuk, 1986) and NMR (Blinc, 1984) data.…”

Section: Discussionmentioning

confidence: 65%

High-resolution neutron powder diffraction studies of the structure of CsDSO₄

Belushkin¹,

David²,

Ibberson³

et al. 1991

Acta Crystallogr Sect B

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High-resolution neutron powder diffraction data were used to determine the crystal structure of the superionic conductor CsDSO4 at 300K (lowconductivity phase) and at 448 K (superionic phase). A full structural analysis was performed, using the Rietveld method, to obtain previously unknown atomic positions, site occupancies and temperature factors for the light atoms. The mechanism of deuterium diffusion is discussed. At 300 K: monoclinic, P2~/c, a = 7.78013 (9), b = 8.13916 (2), c = 7.72187 (9) A, fl = 110.8720 (4) °, Rwp = 4.19% for 7331 profile points (844 reflections). At 448 K: tetragonal, 141/amd, a = 5-74147 (9), c --14-31508 (26) A, Rwp = 2"21% for 8289 profile points (194 reflections).

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Section: Discussionmentioning

confidence: 65%

High-resolution neutron powder diffraction studies of the structure of CsDSO₄

Belushkin¹,

David²,

Ibberson³

et al. 1991

Acta Crystallogr Sect B

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“…Many crystals of various hydrogen sulphates and selenates were found to exhibit protonic conduction and superionic phase transition [10][11][12][13][14][15][16][17][18][19][20][21][22][23], however, the conductivity changes at the phase transition temperature T$ and the activation energies in the superionic phase are very different. The conductivity jump at Ts in a simple selenate CsHSeO4 was of about four orders of magnitude, and a small activation energy Wa = Wb = Wc = 0.10 eV was obtained in the superionic phase [18].…”

Section: Discussionmentioning

confidence: 99%

Superionic Phase Transition in Rb₄LiH₃(SeO₄)₄Single Crystals

et al. 1994

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Derivatographic, dielectric and complex impedance studies of Rb4LiH3(SeO4)4 crystals revealed a superionic phase transition at T$ = 448 K. The bulk conductivity rises from 10 -6 to 10 -4 (Ωm)-1 at Ts , and the activation energy of conductivity in the direction of crystal axes a and b (where a = b for tetragonal symmetry) Wa = W b d e c r e a s e s f r o m 0.94 eV in the low temperature phase to the value of 0.27 eV at T > T5. The analysis of the results of X-ray studies at room temperature and at 450 K indicates that the fast ion transport, characterized by low activation energy, is related to the delocalization of the H2 protons in the O(12)-H2-O(24) bonds linking the Se(1)O 4 and Se(2)O4 tetrahedra. The "cogwheel" mechanism is suggested to be involved in the fast proton transport.

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“…The jump in T 1 -1 at T c2 and the behavior of T 1 -1 are rather unusual. The drastic decrease in the T 1 -1 upon transitioning to the superionic I phase is due to the contribution of Cs + nuclei, as well as to the previously reported proton contribution [25]. The relaxation rate increases with increasing temperature in phases II and III while in phase I, it decreases with increasing temperature.…”

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confidence: 89%

M and ¹H NMR, ionic motions and phase transitions in proton conducting MHSO₄ (M = K, Rb, Cs, and NH₄) single crystals

Lim

2005

Physica Status Solidi (b)

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The M and1 H spin -lattice relaxation rates in MHSO 4 (M = K, Rb, Cs, and NH 4 ) single crystals were measured over a wide temperature range. The temperature dependences of the 1 H spin -lattice relaxation rates in RbHSO 4 and NH 4 HSO 4 can be explained by using the Bloembergen -Purcell -Pound theory while the temperature dependence of the 1 H spin -lattice relaxation rate in KHSO 4 cannot. Also, the relaxation process for M in MHSO 4 crystals differs depending on M. It is well known that the characteristic features of MHSO 4 crystals depend on whether M is K, Rb, Cs or NH 4 ; specifically, NH 4 HSO 4 and RbHSO 4 exhibit ferroelectricity but KHSO 4 and CsHSO 4 do not. Consequently, although the MHSO 4 crystals considered here are all members of the alkali acid sulfate family, our relaxation rate results varied depending on the mechanism of the ionic motion. This suggests that the differences in the chemical properties of M (= K, Rb, Cs, and NH 4 ) are responsible for the variations of the natures of the phase transitions in these crystals.

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Spin‐Lattice Relaxation and Self‐Diffusion Study of the Protonic Superionic Conductors CsHSeO₄ and CsHSO₄

Cited by 103 publications

References 5 publications

High-resolution neutron powder diffraction studies of the structure of CsDSO₄

High-resolution neutron powder diffraction studies of the structure of CsDSO₄

Superionic Phase Transition in Rb₄LiH₃(SeO₄)₄Single Crystals

M and ¹H NMR, ionic motions and phase transitions in proton conducting MHSO₄ (M = K, Rb, Cs, and NH₄) single crystals

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Spin‐Lattice Relaxation and Self‐Diffusion Study of the Protonic Superionic Conductors CsHSeO4 and CsHSO4

Cited by 103 publications

References 5 publications

High-resolution neutron powder diffraction studies of the structure of CsDSO4

High-resolution neutron powder diffraction studies of the structure of CsDSO4

Superionic Phase Transition in Rb4LiH3(SeO4)4Single Crystals

M and 1H NMR, ionic motions and phase transitions in proton conducting MHSO4 (M = K, Rb, Cs, and NH4) single crystals

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Spin‐Lattice Relaxation and Self‐Diffusion Study of the Protonic Superionic Conductors CsHSeO₄ and CsHSO₄

High-resolution neutron powder diffraction studies of the structure of CsDSO₄

High-resolution neutron powder diffraction studies of the structure of CsDSO₄

Superionic Phase Transition in Rb₄LiH₃(SeO₄)₄Single Crystals

M and ¹H NMR, ionic motions and phase transitions in proton conducting MHSO₄ (M = K, Rb, Cs, and NH₄) single crystals