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• Sulphur ignites spontaneously in fluorine at room temperature.
• Amorphous boron is spontaneously flammable (or combustible) at 800°C.
Русско-английский научно-технический словарь• Sulphur ignites spontaneously in fluorine at room temperature.
• Amorphous boron is spontaneously flammable (or combustible) at 800°C.
Русско-английский научно-технический словарь