I would suspect anywhere there is free oxygen and an ignition source. Assuming, of course, the temperature/thermodynamics/pressure is within tolerances. Perha

I would suspect anywhere there is free oxygen and an ignition source. Assuming, of course, the temperature/thermodynamics/pressure is within tolerances. Perhaps with free fluorine or maybe free chlorine. Finely divided metals like lithium or elements like phosphorus are excitable enough to get exothermic reactions going that approximate “fire”.