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Uranium glass is glass which has had uranium, usually in oxide diuranate form, added to a glass mix before melting for colouration. The proportion usually varies from trace levels to about 2% uranium by weight, although some 20th-century pieces were made with up to 25% uranium.
Uranium (0.1 to 2%) can be added to give glass a fluorescent yellow or green color. [8] Uranium glass is typically not radioactive enough to be dangerous, but if ground into a powder, such as by polishing with sandpaper, and inhaled, it can be carcinogenic. When used with lead glass with very high proportion of lead, produces a deep red color.
Glassmakers can achieve the look of uranium glass using other neon green colorants, but they don't react to black light the way the real thing does. When UV light shines on uranium glass it glows ...
Uranium glass occupies a little-known niche in the collectibles world, whose members appreciate its soft color and distinctive glow, which comes from the uranium added as the glass was created.
Uranium glass glowing under UV light. Before (and, occasionally, after) the discovery of radioactivity, uranium was primarily used in small amounts for yellow glass and pottery glazes, such as uranium glass and in Fiestaware. [24]
Black ceramics, a glass-like coal-black material with a surface pitted with many cavities and pores. Usually located near the places where corium formed. Its two versions contain about 4–5 wt.% and about 7–8 wt.% of uranium. Brown ceramics, a glass-like brown material usually glossy but also dull. Usually located on a layer of a solidified ...
Uranium glass used as lead-in seals in a vacuum capacitor. Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass-encapsulated semiconductor diodes, reed switches, glass windows in metal cases, and metal or ceramic packages of ...
Uranium in secular equilibrium with its daughter nuclides (e.g., uranium minerals) can pose a radon problem, but purified uranium (e.g., in uranium glass) cannot. This can be seen (or computed) from the U-238 decay chain .