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  Encyclopedia of Keywords > Nature > Natural Resources > Minerals > Metals > Osmium   Michael Charnine

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  1. Osmium is a very hard, brittle, lustrous bluish-white metal with a close-packed hexagonal crystalline structure. (Web site)
  2. Osmium is used in ball pens, as a forensic stain, and in electronic applications. (Web site)
  3. Osmium was discovered by Smithson Tennant in 1804 in a residue left after dissolving crude platinum in aqua regia. (Web site)
  4. Osmium was discovered in 1804 by English chemist Smithson Tennant (1761-1815).
  5. Osmium was used in Forerunner technologies, as part of an alloy with another as-yet unidentified material. (Web site)

Osmium Tetroxide

  1. The compound ruthenium tetroxide, RuO 4, similar to osmium tetroxide, is highly toxic and may explode.
  2. Unfortunately, osmium tetroxide smells bad and is very poisonous. (Web site)
  3. Osmium tetroxide (OsO 4) is in demand for use as a catalyst for research purposes. (Web site)

Powdered Osmium

  1. Powdered osmium is easier to make, but powdered osmium exposed to air leads to the formation of osmium tetroxide (Os O 4), which is toxic.
  2. Powdered osmium is easier to make, but powdered osmium exposed to air leads to the formation of osmium tetroxide (OsO4), which is toxic.
  3. Powdered osmium is easier to make but emits osmium tetroxide (OsO 4) when it is exposed to the air. (Web site)


  1. Osmium is found in platinum ores and in the mineral osmiridium. (Web site)
  2. It is used to harden platinum, combined with osmium in creating gold-tip pens, and to make highly specialized crucibles. (Web site)


  1. It falls between platinum and osmium in group VIII of the periodic table.
  2. The platinum group includes palladium, gold, rhodium, osmium, rhenium, iridium and ruthenium.
  3. Platinum is part of the Platinum Group Metals or PGM. The PGM include platinum, palladium, rhodium, ruthenium, iridium and osmium.


  1. In the summer of 1803, Tennant identified two new elements; osmium and iridium. (Web site)
  2. Osmium ( Greek osme meaning "a smell") was discovered in 1803 by Smithson Tennant and William Hyde Wollaston in London, England. (Web site)
  3. Osmium and iridium were discovered at the same time by the British chemist Smithson Tennant in 1803.


  1. In geochemist's lingo, osmium is a compatible element while rhenium is strongly incompatible.
  2. Here's a look at what we can do with two of Earth's rarest elements, rhenium and osmium. (Web site)
  3. Now that we can measure them in the parts-per-trillion range, we're finding that rhenium and osmium are a unique team. (Web site)
  4. Today almost all of the planet's rhenium and osmium are in the iron core, leaving the silicate mantle with just a whisper, less than one part per billion. (Web site)

Melting Point

  1. Osmium reacts with fluorine or chlorine gas at high temperatures to give the tetrafluoride or tetrachloride. (Web site)
  2. After only a few years, osmium was replaced by the more stable metal tungsten (originally known as wolfram).
  3. It has a melting point of 2623--C, and only tantalum, osmium, rhenium and tungsten have higher melting points.
  4. Osmium metal has the highest melting point and the lowest vapor pressure of the platinum family. (Web site)


  1. Naturally occurring iridium alloys include osmiridium and iridiosmium, both of which are mixtures of iridium and osmium.
  2. A hard alloy of osmium and iridium is used commercially for tips of fountain pens and phonograph needles. (Web site)
  3. Osmium and its alloys are hard and resistant to corrosion and wear (particularly to rubbing wear). (Web site)


  1. Hassium (eka-osmium)is a chemical element in the periodic table that has the symbol Hs and atomic number 108.
  2. The chemical symbol for Osmium 76 element is Os. (Web site)
  3. Columbia Encyclopedia: osmium ( --z ' m----m) , metallic chemical element; symbol Os; at. (Web site)


  1. Osmium has seven naturally-occurring isotopes, 5 of which are stable: Os-187, Os-188, Os-189, Os-190, and (most abundant) Os-192.
  2. In 1898 an Austrian chemist, Auer von Welsbach, developed the Oslamp with a filament made of osmium, which he introduced commercially in 1902. (Web site)
  3. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. (Web site)
  4. Hassium oxidizes similar to osmium above it, to a hassium tetroxide with a lower volatility than osmium tetroxide.
  5. The compound is noteworthy for its many uses, despite the rarity of osmium. (Web site)

Platinum Metals

  1. Iridium is found uncombined in nature as the metal and in combination with osmium and platinum. (Web site)
  2. Other platinum metals include ruthenium, rhodium, palladium, osmium, and indium.
  3. Some alloys of osmium and platinum are also used to make specialized laboratory equipment.
  4. Also together with other platinum metals osmium accompanies nickel until electrorefining operation, where osmium together with other PGM goes to the slime.

Been Used

  1. Osmium is found native as an alloy in platinum ore and its tetroxide has been used to stain tissues and in fingerprinting. (Web site)
  2. Osmium tetroxide has been used in fingerprint detection and in staining fatty tissue for microscope slides. (Web site)
  3. Osmium tetroxide has been used in fingerprint A fingerprint is an imprint made by the pattern of ridges on the pad of a human finger.


  1. An alloy with osmium is used to make fountain-pen nibs. (Web site)
  2. High-end pen nibs have osmium tips. (Web site)


  1. The extraordinary density of osmium is a consequence of the lanthanide contraction.
  2. Common oxidation states of osmium are +4 and +3, but oxidation states from +1 to +8 are observed.
  3. In addition to the valences noted above, osmium assumes other valences between 0 and +8 in various compounds. (Web site)
  4. Osmium is not affected by common acids but is oxidized to the tetroxide by hot nitric acid, hot sulfuric acid, or aqua regia. (Web site)
  5. Osmium is quite valuable, costing about US $100 per gram (g). (Web site)


  1. Alloys of osmium are employed in fountain pen tips, electrical contacts and in other applications where extreme durability and hardness are needed. (Web site)
  2. Iridium is also alloyed with osmium to make the tips of fountain pens and compass bearings. (Web site)


  1. Osmium Facts Learn about the properties and characteristics of the element osmium. (Web site)
  2. The video below shows facts about Osmium, where is Osmium found, uses of Osmium, and who discovered Osmium. (Web site)


  1. Of the elements, only carbon and tungsten have higher melting points and only iridium, osmium, and platinum are more dense. (Web site)
  2. Osmium in a metallic form is extremely dense, blue-white, brittle, and lustrous even at high temperatures, but proves to be extremely difficult to make.


  1. Due to its very high density osmium is generally considered to be the heaviest known element narrowly defeating iridium.
  2. Due to its very high density osmium is generally considered to be the densest known element, narrowly defeating iridium.
  3. The measured density of this element is only slightly lower than that of osmium, which is therefore often listed as the heaviest element known.


  1. The measured density of iridium is only slightly lower than that of osmium, which is often listed as the densest element known.
  2. Notes ^ The two competitors for densest natural element are osmium and iridium.


  1. Airborne low concentrations of osmium can cause lung congestion, skin or eye damage. (Web site)
  2. Like other elements, osmium particles can cause damage to the mucus membranes because they act as an irritant. (Web site)


  1. A body, for example, with similar properties to those of osmium was assumed to be eka-osmium (Z = 94) rather than osmium (z = 76) or ruthenium (z = 44). (Web site)
  2. TD {font-size:10pt} Eka-osmium definition of Eka-osmium in the Free Online Encyclopedia. (Web site)


  1. Nature > Natural Resources > Minerals > Metals
  2. Encyclopedia of Keywords > Nature
  3. Encyclopedia of Keywords > Nature > Matter > Periodic Table
  4. Glossaries > Glossary of Chemical Elements /
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  Short phrases about "Osmium"
  Originally created: May 07, 2008.
  Links checked: March 14, 2013.
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