tungstenic$85701$ - Übersetzung nach deutsch
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tungstenic$85701$ - Übersetzung nach deutsch

CHEMICAL ELEMENT WITH SYMBOL W AND ATOMIC NUMBER 74
Wolframium; Element 74; Tungstenic; Tungstem; Tungsten compounds; Tungston; W (element); Tungsten processing; Tungsten Mining; Tungsten carbonate; Wolfram (element); Tungsten alloy; Native tungsten; Tungsten nanowire; Tungsten silver; Volfram; Tungsten mining; Biological roles of tungsten; Tungsten compound; Compounds of tungsten; Wolfram compounds; Compounds of wolfram; History of tungsten
  • Tungsten mining in [[Rwanda]] forms an important part of the country's economy.
  • Tungsten electrode used in a [[gas tungsten arc welding]] torch
  • Close-up of a tungsten filament inside a [[halogen lamp]]
  • [[Tungsten carbide]] jewelry
  • Wolframite mineral, with a scale in cm

tungstenic      
adj. tungstenisch (Tungsten- seltenes metallisches Element)

Definition

Tungsten
·noun Scheelite, or calcium tungstate.
II. Tungsten ·noun A rare element of the chromium group found in certain minerals, as wolfram and scheelite, and isolated as a heavy steel-gray metal which is very hard and infusible. It has both acid and basic properties. When alloyed in small quantities with steel, it greatly increases its hardness. Symbol W (Wolframium). Atomic weight, 183.6. Specific gravity, 18.

Wikipedia

Tungsten

Tungsten, or wolfram, is a chemical element with the symbol W and atomic number 74. Tungsten is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a new element in 1781 and first isolated as a metal in 1783. Its important ores include scheelite and wolframite, the latter lending the element its alternate name.

The free element is remarkable for its robustness, especially the fact that it has the highest melting point of all known elements, melting at 3,422 °C (6,192 °F; 3,695 K). It also has the highest boiling point, at 5,930 °C (10,706 °F; 6,203 K). Its density is 19.30 grams per cubic centimetre (0.697 lb/cu in), comparable with that of uranium and gold, and much higher (about 1.7 times) than that of lead. Polycrystalline tungsten is an intrinsically brittle and hard material (under standard conditions, when uncombined), making it difficult to work into metal. However, pure single-crystalline tungsten is more ductile and can be cut with a hard-steel hacksaw.

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. Tungsten compounds are often used as industrial catalysts.

Tungsten is the only metal in the third transition series that is known to occur in biomolecules, being found in a few species of bacteria and archaea. However, tungsten interferes with molybdenum and copper metabolism and is somewhat toxic to most forms of animal life.