Lasted edited by Andrew Munsey, updated on June 15, 2016 at 1:21 am.
Discussion page for Directory:Petravoltaic -- Electricity from Rocks
Certain types of igneous rocks exhibit a weak electrical potential that is neither piezoelectric (pressure induced voltage), nor pyroelectric (heat-change induced voltage), but petravoltaic. This is to say that there is a continuous, steady voltage across the rock.
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