köken: Ultimately from New Latin hafnium, with the suffix -um removed as with most chemical elements. An extra i is added to ease pronunciation and to preserve an appearance that is more representative of the chemical symbol.
Hafni(IV) oxit được đánh giá là khá trơ. — Hafniyum(IV) Oksit oldukça atıldır.
Hafnij sta leta 1923 v danskem Københavnu (latinsko ime: Hafnia) odkrila Dirk Coster in Georg von Hevesy. — Hafniyum elementi 1923 yılında Dirk Coster ve Georg von Hevest tarafından Danimarka’da keşfedilmiştir.