Silver diffusion and isotope effect in silver rubidium iodide

Thesis/Dissertation · Tue Jan 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/5344405· OSTI ID:5344405

Arzigian, James Simon ^[1]

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1. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Physics

The diffusion coefficient of silver in (RbAg ₄I ₅) was measured in both superionic phases using radiotracer Ag-110m and serial sectioning with a low temperature sectioning apparatus. The activation energies for diffusion in alpha-RbAg₄I₅ and beta-RbAg₄I₅, respectively, are 0.11 ± 0.01 eV and 0.20 ± 0.04 eV. An isotope effect for diffusion was also measured in both superionic phases. Ag-105 and Ag-110m radioisotopes were used with gamma spectroscopy and energy discrimination. The effect is small, with no significant temperature variation, with the value at 333 K being 0.12 ± 0.01. The second-order phase transition at 208 K has a small effect, if any, on the magnitude of the effect. The data suggest that a highly cooperative transport mechanism is responsible for the unusually high values of both the conductivity and diffusion coefficient. Although it is not possible to deduce the particular mechanism involved, theories involving ionic polarons, or cooperative motion, such as crowdions or solitons, seem consistent with the observed results.

• Research Organization: Illinois Univ., Urbana (United States). Dept. of Physics
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76ER01198
• OSTI ID: 5344405
• Report Number(s): DOE/ER/01198-1317; TRN: 80-012639
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
RUBIDIUM IODIDES
IONIC CONDUCTIVITY
SILVER
DIFFUSION
SILVER 105
ISOTOPE EFFECTS
SILVER 110
SILVER IODIDES
MEDIUM TEMPERATURE
ALKALI METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
IODIDES
IODINE COMPOUNDS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
METALS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHYSICAL PROPERTIES
RADIOISOTOPES
RUBIDIUM COMPOUNDS
SECONDS LIVING RADIOISOTOPES
SILVER COMPOUNDS
SILVER ISOTOPES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties