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Hf
Hafnium
Atomic no.:
72
Atom. weight: 178.49
Density: 13.31
Class:
refractory metal
Melting point: 2227°C
Boiling point: 4602°C
Colour: Array
   
Discoverer: Dirk Coster and György K. von Hevesy
Place: Copenhagen, Denmark
Year: 1923

Discovered in 1923 by D. Coster and G.C. von Hevesey in Copenhagen, Denmark. Hafnium is a silvery colored, ductile metal which is found in all minerals containing zirconium. The chemistries of the two metals are similar which makes them difficult to separate, and the properties of each are greatly affected by the presence of the other as an impurity. Both zirconium and hafnium are extracted as the pure metal by reducing the tetrahalide with magnesium, the whole process being carried out under argon as both metals readily combine with other gases (e.g. nitrogen). The abundance of hafnium in the earth's crust is 5.3 ppm. Hafnium will resist corrosion in air due to the formation of an oxide film, although powdered hafnium will burn in air. It is unaffected by alkalis and acids, with the exception of HF. Hafnium can be used to control recrystallization of tungsten filaments but its main application is as control rod material in nuclear reactors due to its ability to absorb neutrons. The ability of hafnium to absorb neutrons means that it can sometimes be an annoying impurity in zironium metal which is used for nuclear engineering.

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  entries 1 to 8 from 55 Gallery view   periodic table

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 Acrylic Element cube - Hafnium Hf - 50mm  Art. Nr. 005031  
Acrylic Element cube - Hafnium Hf - 50mm
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The Sensation! Acrylic Element-blocks NEW!

Hafnium Hf - massive high pure crystal bar with 30 grams! Breathtaking!

The innovation! Selected element samples in amply amount embedded in 50x50x50mm first-class crystal clear acrylic (not cheap resin!) . Totally lightfast, high gloss polish. The text is embedded inside! Hand crafted! Made in the European Union! Each acrylic block is a unique and individual piece! EXTREMELY eye-catching!

These original acrylic cubes are used in many important and famous periodic table collections allover the world!

100% Handmade in the European Union!

 

Each cube comes in its separate original box!
     

Complete illuminated displays with our cubes are available on request

Amount: 1 St.
Purity : 99.9%
Packing: PE bag
131.00
- tax free
5-9 pcs.: 124.00 Euro
Availability: 9 in stock

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 Mini-Hafnium Crystal Bar - 27.21g very shiny and clear!  Art. Nr. 005038  
Mini-Hafnium Crystal Bar - 27.21g very shiny and clear!
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Superb Hafnium Crystal Bar - 27.21g

This rare and small Hafnium Crystal Bar was created by a power outage at the manufacturer, so the procedure had to be stopped and it resulted in beautiful miniature Crystal Bars with stunning diamond-shining crystals on the surface

This hafnium is very pure, >99,9% with a Zirconium content ~ 1%!

Amount: 27.21g
Purity : 99.9%
Packing: PE-bag
88.00
- tax free

Availability: 1 in stock

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 Mini-Hafnium Crystal Bar - 31.12g very shiny and clear!  Art. Nr. 005037  
Mini-Hafnium Crystal Bar - 31.12g very shiny and clear!
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Superb Hafnium Crystal Bar - 31.12g

This rare and small Hafnium Crystal Bar was created by a power outage at the manufacturer, so the procedure had to be stopped and it resulted in beautiful miniature Crystal Bars with stunning diamond-shining crystals on the surface

This hafnium is very pure, >99,9% with a Zirconium content ~ 1%!

Amount: 31.12g
Purity : 99.9%
Packing: PE-bag
88.00
- tax free

Availability: 1 in stock

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 Mini-Hafnium Crystal Bar - 28.54g very shiny and clear!  Art. Nr. 005036  
Mini-Hafnium Crystal Bar - 28.54g very shiny and clear!
magnify Click to zoom!

Superb Hafnium Crystal Bar - 28.54g

This rare and small Hafnium Crystal Bar was created by a power outage at the manufacturer, so the procedure had to be stopped and it resulted in beautiful miniature Crystal Bars with stunning diamond-shining crystals on the surface

This hafnium is very pure, >99,9% with a Zirconium content ~ 1%!

Amount: 28.54g
Purity : 99.9%
Packing: PE-bag
88.00
- tax free

Availability: 1 in stock

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 Mini-Hafnium Crystal Bar - 29.25g very shiny and clear!  Art. Nr. 005034  
Mini-Hafnium Crystal Bar - 29.25g very shiny and clear!
magnify Click to zoom!

Superb Hafnium Crystal Bar - 29.25g

This rare and small Hafnium Crystal Bar was created by a power outage at the manufacturer, so the procedure had to be stopped and it resulted in beautiful miniature Crystal Bars with stunning diamond-shining crystals on the surface

This hafnium is very pure, >99,9% with a Zirconium content ~ 1%!

Amount: 29.25g
Purity : 99.9%
Packing: PE-bag
88.00
- tax free

Availability: 1 in stock

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 200 grams pure Hafnium metal melted pellets, purity 99.9%  Art. Nr. 004677  
200 grams pure Hafnium metal melted pellets, purity 99.9%
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200 grams vacuum melted ultra pure Hafnium metal beads

Zr content: 0.91%

clean & shiny pieces in high quality argon flooded taper joint glass bottle to prevent oxidation of this metal.

Size of the bottle: H = 85mm x D = 41mm
The bottle will be shipped in vacuum sealed foil.

Amount: 200g
Purity : 99.9%
Packing: PE - bag
781.00
- tax free

Availability: 3 in stock

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 High purity hafnium metal rod >42mm length - 11.5mm diameter  Art. Nr. 001343  
High purity hafnium metal rod >42mm length - 11.5mm diameter
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High purity Hafnium rod >99,9% - Zr <1%

Diameter 11.5mm - Length ~ 42mm. This high purity hafnium rod meets highest industrial standards and are best choice for elements collectors as well as for use in industry, jewellery, arts and crafts etc.

Amount: 57.4g
Purity : >99.9%
Packing: PE-bag
262.00
- tax free

Availability: 4 in stock

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 Acrylic Element cube - Hafnium Hf - 50mm  Art. Nr. 003075  
Acrylic Element cube - Hafnium Hf - 50mm
magnify Click to zoom!

The Sensation! Acrylic Element-blocks NEW!

Hafnium Hf - big shiny Hafnium metal turning

The innovation! Selected element samples in amply amount embedded in 50x50x50mm first-class crystal clear acrylic (not cheap resin!) . Totally lightfast, high gloss polish. The text is embedded inside! Hand crafted! Made in the European Union! Each acrylic block is a unique and individual piece! EXTREMELY eye-catching!

These original acrylic cubes are used in many important and famous periodic table collections allover the world!

100% Handmade in the European Union!

 

Each cube comes in its separate original box!
     

Complete illuminated displays with our cubes are available on request

Amount: 1 St.
Purity : 99.9%
Packing: PE bag
53.00
- tax free

Availability: 1 in stock

All pictures are copyright protected and may not be used without our permission!

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Amount:
 
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