Assertion: metallic osmium | /r/HasProperty | pyrophoric
Facets:
Source sentences:
text: Metallic osmium is harmless but finely divided metallic osmium is pyrophoric and reacts with oxygen at room temperature, forming volatile osmium tetroxide.
text: Metallic osmium is harmless but finely divided metallic osmium is pyrophoric and reacts with oxygen at room temperature, forming volatile osmium tetroxide.
text: Finely divided metallic osmium is pyrophoric  and reacts with oxygen at room temperature, forming volatile osmium tetroxide.