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  2. Tungsten - Wikipedia

    en.wikipedia.org/wiki/Tungsten

    Tungsten occurs in many alloys, which have numerous applications, including incandescent light bulb filaments, X-ray tubes, electrodes in gas tungsten arc welding, superalloys, and radiation shielding. Tungsten's hardness and high density make it suitable for military applications in penetrating projectiles.

  3. Category:Tungsten - Wikipedia

    en.wikipedia.org/wiki/Category:Tungsten

    Pages in category "Tungsten" The following 10 pages are in this category, out of 10 total. This list may not reflect recent changes. ...

  4. Ring (jewellery) - Wikipedia

    en.wikipedia.org/wiki/Ring_(jewellery)

    Ruby ring. A ring is a round band, usually made of metal, worn as ornamental jewelry.The term "ring" by itself denotes jewellery worn on the finger; when worn as an ornament elsewhere, the body part is specified within the term, e.g., earrings, neck rings, arm rings, and toe rings.

  5. Tungsten carbide - Wikipedia

    en.wikipedia.org/wiki/Tungsten_carbide

    Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering [7] for use in industrial machinery, engineering facilities, [8] molding blocks, [9] cutting tools, chisels, abrasives, armor ...

  6. Tellurium - Wikipedia

    en.wikipedia.org/wiki/Tellurium

    Shqip; Sicilianu; Simple English ... consisting of two fused 5-membered tellurium rings. The latter cation is formed by the reaction of tellurium with tungsten ...

  7. Ammonium paratungstate - Wikipedia

    en.wikipedia.org/wiki/Ammonium_paratungstate

    Heating ammonium paratungstate to its decomposition temperature of 600 °C yields tungsten(VI) oxide, as described in this idealized equation: (NH 4) 10 (H 2 W 12 O 42)·4H 2 O → 12 WO 3 + 10 NH 3 + 6 H 2 O. From there, the trioxide is heated in an atmosphere of hydrogen, yielding elemental tungsten: [3] WO 3 + 3 H 2 → W + 3 H 2 O

  8. Scheelite - Wikipedia

    en.wikipedia.org/wiki/Scheelite

    Scheelite is a calcium tungstate mineral with the chemical formula Ca W O 4.It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786).

  9. Bismuth - Wikipedia

    en.wikipedia.org/wiki/Bismuth

    Most bismuth is produced as a byproduct of other metal-extraction processes including the smelting of lead, and also of tungsten and copper. Its sustainability is dependent on increased recycling, which is problematic.