Assertion: osmium | /r/MadeOf | an alloy of osmium and iridium
Facets:
value: essentially
type: DEGREE
Source sentences:
text: OSMIUM [symbol Os., atomic weight 190.9 (O=16)], in chemistry, a metallic element, found in platinum ore in small particles, consisting essentially of an alloy of osmium and iridium and known as osmiridium.