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.

Tungsten(VI) oxide, also known as tungsten trioxide is a chemical compound of oxygen and the transition metal tungsten, with formula WO 3.The compound is also called tungstic anhydride, reflecting its relation to tungstic acid H 2 WO 4.It is a light yellow crystalline solid. Tungsten(VI) oxide occurs naturally in the form of hydrates, which include minerals: tungstite WO 3 ·H 2 O, …

Tungsten Network is a global electronic invoicing firm that provides supply chain financing services from international offices in the United Kingdom, United States, Bulgaria, Germany, and Malaysia. As a small- to medium-sized IT company, they have an estimated revenue of £31.3 million (GBP) as of July 2017. Tungsten Corporation Plc (TUNG) is reported to trade regularly …

Tungsten hexachloride is the chemical compound of tungsten and chlorine with the formula WCl 6.This dark violet blue species exists as a volatile solid under standard conditions. It is an important starting reagent in the preparation of tungsten compounds. Other examples of charge-neutral hexachlorides are ReCl 6 and MoCl 6.The highly volatile WF 6 is also known.

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 for use in industrial machinery, cutting tools, chisels, abrasives, armor-piercing shells and jewelry.

The NTSC and PAL TV norms call for a compliant TV screen to display an electrically black and white signal (minimal color saturation) at a color temperature of 6500 K. On many consumer-grade televisions, there is a very noticeable deviation from this requirement. However, higher-end consumer-grade televisions can have their color temperatures adjusted to 6500 K by using a …

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light.A typical human eye will respond to wavelengths from about 380 to about 750 nanometers. In terms of frequency, this corresponds to a band in the vicinity of 400–790 terahertz.

炭化タングステン（たんかタングステン、英: tungsten carbide 、化学式：WC）とは等モル量のタングステン原子と炭素原子からなる無機化合物（炭化物）である。 英語名に基づき、タングステンカーバイドとも呼ばれる。

Tungsten(III) oxide (W 2 O 3) is a compound of tungsten and oxygen.It has been reported (2006) as being grown as a thin film by atomic layer deposition at temperatures between 140 and 240 °C using W 2 (N(CH 3) 2) 6 as a precursor. It is not referred to in major textbooks. Some older literature refers to the compound W 2 O 3 but as the atomic weight of tungsten was …

Primorsky Krai (Russian: Приморский край), informally known as Primorye (Приморье, [prʲɪˈmorʲjɪ]), is a federal subject (a krai) of Russia, located in the Far East region of the country and is a part of the Far Eastern Federal District.The city of Vladivostok is the administrative center of the krai, and the second largest city in the Russian Far East, after Khabarovsk.