Assertion: hafnium's use | /r/HasProperty | rare
Facets:
value: very
type: DEGREE
Source sentences:
text: The noun HAFNIUM has 1 sense: 1. a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons Familiarity information: HAFNIUM used as a noun is very rare.
text: They are also finding more applications in blast furnace linings, although this use is still rare.