Assertion: element osmium | /r/HasProperty | discovered in combination
Facets:
value: by british chemist smithson tennant
type: OTHER
value: with the element iridium
type: OTHER
Source sentences:
text: The element osmium has been discovered in combination with the element iridium in 1804 by British chemist Smithson Tennant when investigating insoluble residues of platinum ore which had been dissolved in aqua regia.