Title: The Changes of Thermal, Dielectric, and Optical Properties at Insertion of Small Concentrations of Ammonium to K3H(SO4)2 Crystals.
Authors: Selezneva, E. V.; Makarova, I. P.; Grebenev, V. V.; Malyshkina, I. A.; Komornikov, V. A.; Gavrilova, N. D.; Chitra, R.; Choudhury, R. R.
Abstract: The structure of (K1-x(NH4)x)3H(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)3H(SO4)2 single crystals has confirmed the existence of a superprotonic phase transition at a temperature of ≈450K. The conducting properties of single-crystal and polycrystalline samples have been studied.
Subjects: AMMONIUM; POTASSIUM compounds; CRYSTAL structure; OPTICAL properties; DIELECTRICS; DOPING agents (Chemistry)
Publication: Crystallography Reports, 2018, Vol 63, Issue 4, p553
ISSN: 1063-7745
Publication type: Academic Journal
DOI: 10.1134/S1063774518040247

The Changes of Thermal, Dielectric, and Optical Properties at Insertion of Small Concentrations of Ammonium to K<sub>3</sub>H(SO<sub>4</sub>)<sub>2</sub> Crystals.

Selezneva, E. V.; Makarova, I. P.; Grebenev, V. V.; Malyshkina, I. A.; Komornikov, V. A.; Gavrilova, N. D.; Chitra, R.; Choudhury, R. R.