Osmium metal cylinder with a purity of 99.95% incl. certificate of analysis precious metal and investment

Buy high-purity osmium metal with at least 99.995% purity now

including certificate of analysis.

Osmium is a precious metal, collector's item and investment.

We offer you the best price for 100g osmium metal cylinders.

The current osmium metal price is currently favorable, so you should buy osmium metal now.

Buy 99.95% osmium metal

Price osmium metal cube 100g 4499Euro

- Deliverable within 12-14 working days by DHL or UPS

- Free delivery within German

Osmium is not only the rarest known precious metal, it is currently the rarest element on earth. Osmium is mined together with platinum. Only 30 grams of osmium are contained in 10,000 tons of platinum ore. The separation of these two metals is complex and therefore very expensive.

Osmium is so valuable not least because of its rarity. It has the highest value density of all eight precious metals and is even many times rarer than gold and silver. All the mineable osmium in the world fits into a cube with an edge length of just 2.1 meters. This low occurrence makes osmium the most valuable precious metal on eart

Osmium is a chemical element with the symbol Os and atomic number 76; in the periodic table of elements it is in the 8th group, the iron group. It is a hard, brittle, blue-grey or blue-black transition metal and belongs to the platinum metals. Osmium has the highest density and the highest compression modulus of all elements.

Osmium has no known biological functions in humans or other organisms. Due to its high price, osmium is only used in technical applications where durability and hardness are crucial.

History of osmium

Osmium was discovered in 1804 by Smithson Tennant together with iridium in the residue of platinum dissolved in aqua regia. The name "osmium" comes from the rettich-like odor (ancient Greek: ὀσμή osmē) of its volatile tetroxide, which is present in low concentrations.

The first important application of the metal at the beginning of the 20th century was its use as a material for filaments in light bulbs by Carl Auer von Welsbach. The name of the Osram company is derived from the metals osmium and tungsten used for this purpose. However, the use of osmium had a number of disadvantages. In addition to the high price, the difficulty of processing was a particular problem. Osmium is brittle and cannot be drawn into filaments. The filaments were therefore produced by spraying a paste containing osmium and then burning off the organic components.[5] However, the resulting filaments were too thick for high voltages and were also sensitive to vibrations and voltage fluctuations. After a short time, they were replaced first by tantalum and finally by tungsten[6].

Occurrence

Osmium is very rare, accounting for 1 - 10-6 % of the earth's crust.[7] It is almost always associated with the other platinum metals ruthenium, rhodium, iridium, palladium and platinum. Osmium is often found in its pure form, but also bound as sulphide, selenide or telluride.

Osmium deposits are divided into primary and secondary deposits. Primary deposits are copper, nickel, chromium or iron ores that contain small amounts of platinum metals in bound form. There are no independent osmium ores. In addition to these ores, there are secondary deposits or placer deposits in which osmium and the other platinum metals occur in solid form. The metals have been washed out by water after weathering and have accumulated in suitable places due to their high density. Osmium is mainly found in the natural alloys osmiridium and iridosmium, which, in addition to osmium, mainly contain iridium and are differentiated according to their predominant component.

The most important deposits are the platinum metal-rich nickel ores in Canada (Sudbury, Ontario), Russia (Urals) and South Africa (Witwatersrand). Secondary deposits are located at the foot of the Urals, in Colombia, Ethiopia and Borneo.

Extraction and presentation

The production of osmium is complex and takes place during the extraction of other precious metals such as gold or platinum. The processes used for this exploit the different properties of the individual precious metals and their compounds, whereby the elements are gradually separated from each other.

Precious metal-bearing ores or anode slimes from nickel or gold production serve as the starting material. The ore is first dissolved in aqua regia. Gold, palladium and platinum dissolve, leaving the other platinum metals and silver behind. The silver initially reacts to form insoluble silver chloride, which can be removed with lead carbonate and nitric acid (formation of silver nitrate). By melting with sodium hydrogen sulphate and subsequent leaching, rhodium can be dissolved and separated as rhodium sulphate. The remaining residue is then melted with sodium peroxide, dissolving osmium and ruthenium and leaving behind the insoluble iridium. If this solution is treated with chlorine, the volatile substances ruthenium tetroxide and osmium tetroxide are formed. When alcoholic sodium hydroxide solution is added, only osmium tetroxide dissolves and can be separated from the ruthenium in this way. The osmium is precipitated with ammonium chloride as a complex and finally reduced with hydrogen to metallic osmium:

Use

There are relatively few technical applications for the element due to its rarity, its complicated production process and the associated high price of 350 US dollars per troy ounce (as of June 2007)[14]. Due to the high toxicity of the oxides, osmium is rarely used in its pure state. Hard osmium-containing alloys of the platinum metals are used in abrasive and wearing applications such as writing balls in ballpoint pens, phonographic scanning needles, shafts and pins in instrument making and electrical contacts. An alloy of 90 % platinum and 10 % osmium is processed into medical implants and artificial heart valves and used in pacemakers. Osmium is sometimes used as a catalyst for hydrogenation.

Symbol: Os

Atomic mass: 190.23 u

Melting point: 3,033 °CBoiling point: 5,027 °C

Electron configuration: [Xe] 4f145d66s2

Atomic number: 76

Date of discovery: 1803

CAS number: 7440-04-2