ionic conductivity (solid state)
File:Superionic ice conducting.svg in a static electric field.]]
Ionic conductivity (denoted by {{math|λ}}) is a measure of a substance's tendency towards ionic conduction. Ionic conduction is the movement of ions. The phenomenon is observed in solids and solutions. Ionic conduction is one mechanism of current.Richard Turton. (2000).The Physics of Solids. New York:: Oxford University Press. {{ISBN|0-19-850352-0}}.
In crystalline solids
In most solids, ions rigidly occupy fixed positions, strongly embraced by neighboring atoms or ions. In some solids, selected ions are highly mobile allowing ionic conduction. The mobility increases with temperature. Materials exhibiting this property are used in batteries. A well-known ion conductive solid is β
=History=
Ionic conduction in solids has been a subject of interest since the beginning of the 19th century. Michael Faraday established in 1839 that the laws of electrolysis are also obeyed in ionic solids like lead(II) fluoride ({{chem2|PbF2}}) and silver sulfide ({{chem2|Ag2S}}). In 1921, solid silver iodide ({{chem2|AgI}}) was found to have had extraordinary high ionic conductivity at temperatures above 147 °C, AgI changes into a phase that has an ionic conductivity of ~ 1 –1 cm−1.{{cln|reason=What on this Earth is "~ 1 –1 cm−1"??? Number and units need fixing! Isn't one of the units of ionic conductivity S/cm???|date=July 2024}} This high temperature phase of AgI is an example of a superionic conductor. The disordered structure of this solid allows the Ag+ ions to move easily. The present record holder for ionic conductivity is the related material {{chem2|Ag2[HgI4]}}.{{Greenwood&Earnshaw2nd|page=800}} β
See also
References
External links
- [http://scitation.aip.org/content/aip/journal/jcp/1/7/10.1063/1.1749319 J Chem Phys]
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