Assertion: pure hafnium | /r/HasProperty | symbol hf
Facets:
Source sentences:
text: Mendeleev predicted Hafnium’s existence when he developed the periodic table in 1869, but didn’t live to see any, because pure Hafnium (symbol Hf) doesn’t occur in nature; it’s always bound with Zirconium (Zr) compounds – usually in a Hf: