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Hf (Hafnium)

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Keterangan

      Hafnium resists corrosion due to an oxide film, but powdered hafnium will burn in air. It is unaffected by all acids except hydrogen fluoride, and also all alkalis. At high temperatures it reacts with oxygen, nitrogen, carbon, boron, sulfur and silicon.

Nama lain (trademark, branding etc.)

 Hafnium, Hafnij, Hafnium - s, Afnio, Háfnio, Гафний, 

Spesifikasi Produk

Overview of Hafnium
Atomic Number 72
Group 4
Period 6
Series Transition Metals
Relative Atomic Mass (12C=12.000)  178.49
Boiling Point  4876K 4603°C 8317°F
Melting Point 2500K 2227°C 4041°F
Density/kg m-3  13310 (293K)
Ground State Electron Configuration  [Xe]4f145d26s2
Electron Affinity(M-M-)/kJ mol-1  61
Discoverer Dirk Coster, Georg C. von Hevesy
Discovery Location Copenhagen Denmark
Discovery Year 1923
Name Origin From Hafnia Latin name of Copenhagen.

Aplikasi

     Hafnium has a good thermal absorption cross-section for neutrons, so is used in control rods in nuclear reactors. It has been successfully alloyed with several metals including iron, titanium and niobium. It is also used in gas-filled and incandescent lights.

Bahan Baku

Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals. Hafnium was the penultimate stable isotope element to be discovered (rhenium was identified two years later). Hafnium is named after Hafnia, the Latin name for "Copenhagen", where it was discovered.

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