Effect of a magnetic field on the disaggregation of ferruginous aggregates of quartz in water

Vodyanitskiĭ, Yu. N.; Osipov, Yu. B.

doi:10.1007/bf00674649

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1980

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“…The potential drops in the natural process are of the order of 10 2 -10 3 kV/cm, several orders of magnitude greater than the model potential drop of 2 kV/cm. This seems to indicate that of these potential drops the dry quartz sands involved in the fulgurite process behave as good conductors in the lightning discharge event, perhaps due to the more conducting surface coatings on the soils or sands which can have a ferroclay, carbonaceous, organic (Vodyanitskii & Osipov, 1973) or saline composition (Petty, 1936;Harland & Hacker, 1966).…”

Section: Resultsmentioning

confidence: 99%

A note on the formation of fulgurites

Williams

Johnson

1980

Geol. Mag.

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SummaryA phenomenon similar to the sand tube fulgurite has been observed in experimental work carried out to compact and sinter metal powders using high voltage discharges. The sand tube fulgurite is a fused quartz tube formed by the passage of a lightning discharge. Further experiments, in which a high voltage discharge was passed from a pointed electrode held above a large volume of copper powder, through to an earthed plate, give a copper product with the characteristic fulgurite morphology. This result suggests that the quartz sand can behave as a good conductor in the lightning discharge, perhaps due to conducting coatings on the surface of the sand particles.

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Section: Resultsmentioning

confidence: 99%