Tungsten Crystal
Nov 21，2023
Tungsten W does not react with oxygen, hydrogen, sulfur, and phosphor directly. It also does not react with acid, aqua regia, and alkali solution. It is slowly soluble in the mixed solution of conc. nitric acid and hydrogen fluoride. W2O3 is formed by heating W in air. W is oxidized on its surface at low vacuum to form WO3 or WO2. These oxides are easy to evaporate, resulting forWwire to thin slowly.
Crystal System
The space lattice of Tungsten W belongs to the cubic system, and its body-centered cubic lattice has a lattice constant of a=0.3158 nm.
Production
W is obtained by oxidizing (Fe, Mn) WO4 or CaWO4 and reducing by the thermit process or by using carbon or hydrogen. Thin films are deposited by vacuum evaporation using the electron beam. The evaporation rate is 1.43×10-4g/cm2 sec at 3309℃.
- Related articles
- Related Qustion
- Industrial Applications and Uses of Tungsten Sep 29, 2019
Industrially tungsten is a very important metal having wide applications. This is due to many outstanding physical properties. Among all the metals, tungsten has the highest melting point and the lowest vapor pressure.
- Industrial Preparation of Tungsten Sep 29, 2019
Tungsten ores such as scheelite and wolframite are recovered from rich veins by underground mining techniques and, to a lesser, economically negligible, extent, by open-pit processes.
Supplementation with pyridoxal 5'-phosphate monohydrate can synthesize neurotransmitters such as dopamine and serotonin, maintaining a healthy nervous system.....
Nov 4，2025Biochemical Engineering
The space lattice of zinc belongs to the hexagonal system, and its closed-packed hexagonal lattice has lattice constants of a=0.2659 nm and c=0.4937 nm (25℃).....
Nov 21，2023Inorganic chemistry
