- Atomic number: 51
- Density: 6.69 g/cm³
- Melting point: 630.7 °C
- Boiling point: 1750 °C
- 99.60 - 99.65 %
- Higher purities on request
Forms of delivery
- Crates 100 kg bis 1 t
- Unpackes on pallet
- Small quantities (Granules, single ingots und fragments from ingot) for research and developement
Antimony buyers information
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Use of antimony
The biggest part of the produced antimony is used as a component in alloys. This is due to its two main characteristics: it hardens lead- and tin alloys and it is the only metal which expands and does not contract instead as it cools down. Due to this second characteristic it is possible to adjust an alloy via the antimony content so that it does not shrink or will even expand a bit when cooling down. Therefore even complicated patterns can be cast without cavitities as the alloy presses itself in any corners and gaps of the mould.
Important antimony alloys are: hard lead (a group of lead antimony alloys, which have a considerably higher mechanical load capacity in comparison to pure lead) and bearing metal (a lead tin antimony copper alloy which is used for plain bearings, in particular for railway bearings).
In addition to the use of metallic antimony there are many applications for antimony trioxide. Outstanding is the flame protection but also the increasing use in electronics and in the production of plastic bottles.
Germanium dehnt sich beim Erstarren ebenso wie Gallium und Bismut aus. Germanium sogar um 6%. Es ist recht korrisionsbeständig gegen Luft und Sauerstoff - erst oberhalb von 600 C° oxidiert es zu Germaniumdioxid. Es gilt als Prototyp eines Halbleiters. Daraus ergibt sich der traditionelle Haupteinsatzbereich Germaniums in der elektronischen Anwendung. Heute gehen nur noch etwa 20% des Metalls dorthin. Größter Verbraucher ist die Kunststoffherstellung, insbesondere in Japan dient Germaniumdioxid zur Herstellung von glasklaren Getränkeflaschen. Neben diesen Bereichen haben sich zunehmend die Infrarottechnik und Fiber-Optik (Glasfaserkabel) als Verbraucher mit zusammen fast 50% des Germanium-Marktes entwickelt. Weitere Anwendungen sind in der Chemotherapie und Metallurgie zu finden.
History and occurrence
Metallic antimony was already known in the Bronze Age, where it was used as an additive for copper to produce bronze. It is also known that the Babylonians and the Chinese knew and used metallic antimony. The Egyptians used it as an eye make-up component. In 1783 metallic antimony was first described as a component of the earth crust by the Swedish scientist Anton von Swab. He found it in an ore block from the silver mine near the Swedish village Sala. Antimony is one of rarer elements.
As it also occurs in a pure form in nature it was recognised as a mineral by the IMA. Today there are about 300 deposits where metallic antimony can be mined. These are located in Australia, Bolivia, Brazil, Germany and the eastern European countries. Until today, 264 antimony minerals are known. The industrially most important one is the sulfide mineral stibnite which contains up to 71.7% antimony.