Investigation of the structural conditionality for changes in physical properties of K{sub 3}H(SO{sub 4}){sub 2} crystals

Journal Article · Sat May 15 00:00:00 EDT 2010 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774510030065· OSTI ID:22051207

Chernaya, T S; Filaretov, A A; Vasil'ev, A L; Verin, I A; Grebenev, V V; Dolbinina, V V ^[1]

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1. Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

With the aim of elucidating the nature of anomalies in the physical properties of K{sub 3}H(SO{sub 4}){sub 2} crystals that arise as the temperature grows, the dielectric and optical properties of the crystals are studied, an X-ray diffraction analysis of single-crystal and polycrystalline specimens are performed, and the morphology and chemical composition are studied by scanning electron microscopy and energy-dispersive X-ray spectroscopy. As a result of the studies performed, a phase transition from the phase with the monoclinic symmetry (space group C2/c) to the phase with the trigonal symmetry (space group R3-barm) is found in a number of K{sub 3}H(SO{sub 4}){sub 2} specimens at a temperature of {approx}457 K, the responsibility of the dynamically disordered hydrogen-bond system for the rise of high proton conductivity in the high-temperature phases of the crystals of this family is confirmed, and data on the solid-phase reactions proceeding at high temperatures are obtained.

• OSTI ID: 22051207
• Journal Information: Crystallography Reports, Vol. 55, Issue 3; Other Information: Copyright (c) 2010 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHEMICAL COMPOSITION
DIELECTRIC PROPERTIES
MONOCLINIC LATTICES
MONOCRYSTALS
MORPHOLOGY
OPTICAL PROPERTIES
PHASE TRANSFORMATIONS
POLYCRYSTALS
POTASSIUM COMPOUNDS
PROTON CONDUCTIVITY
SCANNING ELECTRON MICROSCOPY
SOLIDS
SPACE GROUPS
SULFATES
SYMMETRY
TEMPERATURE RANGE 0400-1000 K
TRIGONAL LATTICES
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY