Carbon stripping charges mineral dust

Heating of tiny mineral grains can remove an adsorbed carbon film and leave the grains electrically charged, explaining why hot ash and sand clouds produce lightning. The lab finding (levitated quartz heated until a carbon layer is stripped) generalizes across dioxide minerals and suggests a straightforward, testable mechanism for dust electrification. — This mechanism links basic surface chemistry to large phenomena — volcanic lightning, dust storms, dust coagulation in planet formation, and potential pathways for prebiotic chemistry — changing how we model atmospheric and planetary processes.