Definition & Betydelse | Engelska ordet IRIDIUM

Definition av IRIDIUM

1. iridium

Exempel på hur man kan använda IRIDIUM i en mening

• Manufacturers use its alloys with platinum, iridium, and other platinum-group metals to make fountain pen nib tipping, electrical contacts, and in other applications that require extreme durability and hardness.
• The Cretaceous–Paleogene boundary, also known as the K-Pg or K-T boundary, or the iridium layer, can be viewed in Raton.
• The cliffs at Højerup are also the place where the father-and-son team of scientists Luis and Walter Alvarez measured the highest level of iridium in the Cretaceous–Paleogene boundary layer, which led them to propose their hypothesis that the Cretaceous–Paleogene extinction event was caused by an impact of a large asteroid 66 million years ago.
• Gold, platinum, and the other platinum group metals (ruthenium, rhodium, palladium, osmium, iridium) are most often so classified.
• Other precious metals include the platinum group metals: ruthenium, rhodium, palladium, osmium, iridium, and platinum, of which platinum is the most widely traded.
• In his PhD work, he discovered recoilless nuclear fluorescence of gamma rays in 191 iridium, the Mössbauer effect.
• Catherine Asaro is the daughter of Frank Asaro, the nuclear chemist who discovered the iridium anomaly that led the team of Luis Alvarez, Walter Alvarez, Frank Asaro, and Helen Michel to postulate that an asteroid collided with the Earth 66 million years ago and caused mass extinctions, including the demise of the dinosaurs.
• In 2016, the company utilized the same technology to introduce a line of iridium wedding bands marketed under the trademark Smithson Tennant.
• Large reserves of platinum, rhodium, ruthenium, palladium, iridium, and osmium have been discovered in Tropojë.
• Vom Mythos zur historischen Wahrheit, which claimed that Noah's flood was the consequence of a bolide impact about 9500 years ago, and supported the claim through geology (impact craters, iridium, shatter cones, stress lamination of minerals, radiocarbon dating, dendrochronology, a peak of acid in the Greenland ice) and legends and folk traditions.
• Verneshots have been proposed as a causal mechanism explaining the statistically unlikely contemporaneous occurrence of continental flood basalts, mass extinctions, and "impact signals" (such as planar deformation features, shocked quartz, and iridium anomalies) traditionally considered definitive evidence of hypervelocity impact events.
• The ejecta, containing shocked minerals and small shatter cones, is composed of rock similar in age and composition to that at the crater, and is associated with an iridium anomaly suggesting contamination with extraterrestrial material.
• It included calcite white body colour, black interior colour, sport package (chrome exhaust tip, 17-inch 7-spoke alloy wheels, chrome iridium silver front grille, stainless acceleration and brake pedals with rubber stud, leather wrapped sport steering wheel and silver shift knob, silver meter panel), bi-xenon headlights and headlight washer, cornering lights, fog lamps (front/rear), rain sensor, sun visor with illuminating mirror, anti-glare mirrors, 'Final Edition' emblem, and floor mats with 'Final Edition' silver logo plates.
• In 1840, Claus, received a substantial amount of platinum ore samples for his studies from the Ural Mountains and the St Petersburg Mint and started working on chemistry and isolation of noble metals, in particular rhodium, iridium, osmium, and to a lesser extent, palladium and platinum.
• Alkene complexes such as cyclooctadiene iridium chloride dimer can also be prepared by heating the hydrate with the appropriate alkene in water/alcohol mixtures.
• The "hatpin" electrodes were made of pure iridium and insulated with parylene, materials that are currently used in the cyberkinetics implementation of the Utah array.
• Initial studies by Monsanto had shown iridium to be less active than rhodium for the carbonylation of methanol.

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