机构:
Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, RussiaRussian Acad Sci, Fed Sci Res Ctr Crystallog & Photon, Shubnikov Inst Crystallog, Moscow 119333, Russia
Gavrilova, N. D.
[2
]
Chitra, R.
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机构:
Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, IndiaRussian Acad Sci, Fed Sci Res Ctr Crystallog & Photon, Shubnikov Inst Crystallog, Moscow 119333, Russia
Chitra, R.
[3
]
Choudhury, R. R.
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h-index: 0
机构:
Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, IndiaRussian Acad Sci, Fed Sci Res Ctr Crystallog & Photon, Shubnikov Inst Crystallog, Moscow 119333, Russia
Choudhury, R. R.
[3
]
机构:
[1] Russian Acad Sci, Fed Sci Res Ctr Crystallog & Photon, Shubnikov Inst Crystallog, Moscow 119333, Russia
[2] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia
[3] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India
The structure of (K1-x (NH4) (x) )(3)H(SO4)(2) crystals with a low ammonium concentration and the behavior of their thermal, optical, and dielectric properties in a temperature range of 275-500 K have been investigated to clarify the influence of doping on the phase transition kinetics. An examination of unit-cell parameters of (K1 - x (NH4) (x) )(3)H(SO4)(2) single crystals has confirmed the existence of a superprotonic phase transition at a temperature of ae450K. The conducting properties of single-crystal and polycrystalline samples have been studied.