Assertion: astatine's compound | /r/HasProperty | discovered by joseph louis gay-lussac
Facets:
value: in 1813–4
type: TEMPORAL
value: independently
type: MANNER
Source sentences:
text: The former, a volatile red-brown compound, was discovered independently by Joseph Louis Gay-Lussac and Humphry Davy in 1813–4 not long after the discoveries of chlorine and iodine, and it mimics the intermediate halogen bromine so well that Justus von Liebig was misled into mistaking bromine (which he had found) for iodine monochloride.