Category:Tungsten

Tung"sten n. Etym: [sw. tungsten (cf. Dan. tungsteen, g. tungstein); Tung heavy (akin to dan. tung, icel. þungr) + sten stone. See stone.]

1. (chem.)

Defn: 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.

2 (min.)

Defn: scheelite, or calcium tungstate. [obs.] Tungsten ocher, or Tungstic ocher (min.), tungstate.