Assertion: tungsten | /r/HasProperty | the most important metal
Facets:
value: for thermo-emission applications
type: PURPOSE
value: because of its high electron emissivity
type: CAUSE
Source sentences:
text: Tungsten is the most important metal for thermo-emission applications, not only because of its high electron emissivity (which is caused by additions of foreign elements) but also because of its high thermal and chemical stability.