Assertion: solid iridium | /r/HasProperty | difficult to machine
Facets:
value: because of brittleness
type: CAUSE
value: because of its hardness
type: CAUSE
value: because of very high melting point
type: CAUSE
Source sentences:
text: Because of its hardness, brittleness, and very high melting point, solid iridium is difficult to machine, form, or work; thus powder metallurgy is commonly employed instead.