Nobody ever tried to find one in ionized gases.
"Long Ago, Far Away"
William Fitzgerald Jenkins AKA Murray Leinster
Solutions of electrolytes such as the ordinary salts, acids, and bases, which are ionized on solution, give values for the various constants of solution which do not accord with those required by theory.
"The Mechanism of Life"
Stéphane Leduc
Some of their elements had to be buried in plastic because otherwise they ionized the air and leaked current like a short.
"Operation Terror"
William Fitzgerald Jenkins