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Mn
Manganese


Atomic no.:
25
Atom. weight: 54.93805
Density: 7.44
Class:
Heavy metal
Melting point: 1244°C
Boiling point: 2032°C
Colour: silvery shiny
   
Discoverer: Johan Gottlieb Gahn
Place: Stockholm, Sweden
Year: 1744

Manganese was discovered in 1774 by J.G. Grahn in Stockholm, Sweden. Manganese is abundant in the earth's crust (950 ppm) and its principle ore is pyrolusite, a crude form of the dioxide. It is obtained by reduction with aluminum or in a blast furnace. Pure manganese is a hard, brittle, silvery colored, metallic element which exists in three polymorphic forms (alpha, beta and gamma) and has a complicated crystal structure. It resembles iron in being moderately reactive and dissolving in cold, dilute non-oxidising acids. When exposed to air, manganese forms an extremely stable oxide coating which is not easily reduced. Pure manganese is ferromagnetic after processing. Manganese is not used as the basis of alloys but it is a common constituent of alloys based on other systems, its addition resulting in a significant improvement in the physical and mechanical properties of the resulting alloys. For example, it is present in all steels and cast iron, the concentration being increased for special grades of material; it is also added to certain grades of brass and bronze as well as some nickel and aluminum base alloys. Manganese is also an important element for living beings as manganese deficiency can result in weakened bones and cause them to be easily broken. On average, a human body will contain 12 mg of the element.

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 Manganese - precision density-standard cube 1cm3  Art. Nr. 004609  
Manganese - precision density-standard cube 1cm3
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Manganese - precision density-standard cube 1cm3

The high effort and the high failure rate due to unfavourable properties of this metal define the price. Cubes of pure melted Manganese are very unique!

Using finest materials, each density cube was lapped to 10x10x10mm by a mechanical engineering company with an accuracy of 0.01 millimeter. Each one separately ground and mirror polished it represents the theoretical density of the respective element by its weight. The weight is not affected by the laser inscription. Information such as element symbol, name and density is durable burned at the surface. Each element even shows its specific characteristis in colour and reaction with the laser. Altogether 25 elements are planned in a complete set in a wooden case.

Amount: 1 St. / 1 pc..
Purity : 99.9%
Packing: PE - bag
503.00
- tax free

Availability: 5 in stock

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 Acrylic Element cube - Manganese Mn - 50mm  Art. Nr. 004950  
Acrylic Element cube - Manganese Mn - 50mm
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The Sensation! Acrylic Element-blocks NEW!

Manganese Mn - 22.71 grams pure Manganese metal pieces without oxide colours 99.7%

You get the cube shown in the picture!


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Amount: 1 St.
Purity : 99.7%
Packing: PE bag
71.00
- tax free

Availability: 1 in stock

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 Manganese 3+ doped glass bead NEW!  Art. Nr. 004937  
Manganese 3+ doped glass bead NEW!
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Glass bead doped with 5% Manganese 3+/ 2+ Ions - NEW! red fluorecence!

Size about 13mm - weight ~ 1.2 - 1.4 grams

Material: BaP:5Mn3+

Nice optical glass bead. Each one handmade in our lab.

  • Pink at normal light
  • Red (strong peak @ 635 nm) under UV excitation

Please do not use common UV LEDs, they produce wavelengths above 390 nm and are not suitable! Blacklight tubes work best! The UV lamp used for the photos has a wavelength of 365nm

 

 

Under daylight they are water clear and colorless

 

Amount: 1 St. / 1 pc.
Purity : --
Packing: PE foil
35.00
- tax free

Availability: 2 in stock

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 Manganese 2+ doped fluorescent glass bead NEW!  Art. Nr. 004868  
Manganese 2+ doped fluorescent glass bead NEW!
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Glass bead doped with 5% Manganese 2+ Ions - NEW! red fluorecence!

Size about 13mm - weight ~ 1.2 - 1.4 grams

Material: BaP:5Mn2+

Nice optical glass bead. Each one handmade in our lab.

  • White at normal light
  • Red (strong peak @ 635 nm) under UV excitation

Please do not use common UV LEDs, they produce wavelengths above 390 nm and are not suitable! Blacklight tubes work best! The UV lamp used for the photos has a wavelength of 365nm

 

 

Under daylight they are water clear and colorless

Amount: 1 St. / 1 pc.
Purity : --
Packing: PE foil
35.00
- tax free
5-9 pcs.: 33.00 Euro
Availability: 7 in stock

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 Acrylic Element cube - Manganese Mn - 50mm  Art. Nr. 004847  
Acrylic Element cube - Manganese Mn - 50mm
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The Sensation! Acrylic Element-blocks NEW!

Manganese Mn - 25.52 grams pure Manganese metal pieces without oxide colours 99.7%

You get the cube shown in the picture!


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Amount: 1 St.
Purity : 99.7%
Packing: PE bag
76.00
- tax free

Availability: 1 in stock

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 High purity electrolytic Manganese chips shiny surface 5g 4N  Art. Nr. 001470  
High purity electrolytic Manganese chips shiny surface 5g 4N
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High purity electrolytic Manganese chips shiny surface - 99.99% purity - 5.0g

Cleaned, shiny oxide free chips sealed in boro-silicate ampoulle under argon to prevent oxydation.

Amount: 5g
Purity : 99.99%
Packing: Ampoule /Argon
25.00
- tax free
5-9 pcs.: 24.00 Euro
>9 pcs.: 23.00 Euro
Availability: 83 in stock

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 High purity electrolytic Manganese chips shiny surface 1.5g  Art. Nr. 001471  
High purity electrolytic Manganese chips shiny surface 1.5g
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High purity electrolytic Manganese chips shiny surface - 99.99% purity - 1.5g

In ampoulle under argon.

Amount: 1.5g
Purity : 99.99%
Packing: Ampoule /Argon
18.00
- tax free
5-9 pcs.: 17.00 Euro
>9 pcs.: 16.00 Euro
Availability: 98 in stock

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 Acrylic Element cube - Manganese Mn - 50mm  Art. Nr. 004948  
Acrylic Element cube - Manganese Mn - 50mm
magnify Click to zoom!

The Sensation! Acrylic Element-blocks NEW!

Manganese Mn - 27.72 grams pure Manganese metal pieces without oxide colours 99.7%

You get the cube shown in the picture!


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Warning: include() [function.include]: Failed opening 'Angebote/Ext/Acrylic-cubes_.inc' for inclusion (include_path='.:/usr/local/lib/php:/kunden/84697_1030/webseiten/') in /kunden/84697_1030/webseiten/imager.php on line 753

Amount: 1 St.
Purity : 99.7%
Packing: PE bag
76.00
- tax free

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

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