Assertion: metallic osmium | /r/HasAspect | known density of all elements
Facets:
value: highest
type: OTHER
value: at ambient pressure
type: OTHER
Source sentences:
text: Metallic osmium (Os) is one of the most exceptional chemical elements, having at ambient pressure the highest known density of all elements, one of the highest cohesive energies, melting temperatures, and a very low compressibility - it is almost as incompressible as diamond.