ytterbium 2 lettres
Metallic ytterbium tends to self-ignition in air. (1) Other researchers are looking into using different atoms, such as calcium, strontium, and ytterbium . At present, ytterbium is mainly used as a dopant of stainless steel or active laser media, and less often as a gamma ray source. [31] Ytterbium lasers commonly radiate in the 1.06–1.12 µm band being optically pumped at wavelength 900 nm–1 µm, dependently on the host and application. Synonyms, Antonyms, Derived Terms, Anagrams and senses of ytterbium. In aqueous solution, like compounds of other late lanthanides, soluble ytterbium compounds form complexes with nine water molecules. Ytterbium is a soft, malleable and ductile chemical element that displays a bright silvery luster when pure. Ytterbium. Power levels have increased from the 1 kW regimes due to the advancements in components as well as the Yb-doped fibers. [42] The optimization of the ytterbium-doped glass itself through host glass modification of various dopants also plays a large part in reducing the background loss of the glass, improvements in slope efficiency of the fiber, and improved photodarkening performance, all of which contribute to increased power levels in 1 µm systems. motscroisés.fr n'est pas affilié à SCRABBLE®, Mattel®, Spear®, Hasbro®, Zynga® with Friends de quelque manière que ce soit. Like X-rays, the gamma rays emitted by the source pass through soft tissues of the body, but are blocked by bones and other dense materials. Finely dispersed ytterbium readily oxidizes in air and under oxygen. blødt og formbart, sølvskinnende metal, med det kemiske symbol Yb og grundstof nr. Most ytterbium compounds are found in the +3 oxidation state, and its salts in this oxidation state are nearly colorless. [7] With a melting point of 824 °C and a boiling point of 1196 °C, ytterbium has the smallest liquid range of all the metals. [8], Ytterbium was discovered by the Swiss chemist Jean Charles Galissard de Marignac in the year 1878. avec 2 lettres, Solutions pour: Ytterbium - mots fléchés et mots croisés. all factors of the fiber must be considered.
In aqueous solution, like compounds of other late lanthanides, soluble ytterbium compounds form complexes with nine water molecules. The model with one single ytterbium ion caught in an ion trap is highly accurate. Ytterbium is a chemical element with symbol Yb and atomic number 70. Abonnez-vous à la lettre d'information L'erbium est un lanthanide gris ; l'oxyde d'erbium(III) (à droite) se présente sous la forme d'une poudre rose. Ytterbium en 2 lettres. Ytterbium - Arabic meanings: الإيتربيوم - Definition & Synonyms English to Arabic dictionary gives you the best and accurate Arabic translation and meanings of Ytterbium. The high-temperature gamma allotrope (6.57 g/cm3) has a body-centered cubic crystalline structure. [30] The clocks developed at the National Institute of Standards and Technology (NIST) rely on about 10,000 rare-earth atoms cooled to 10 microkelvin (10 millionths of a degree above absolute zero) and trapped in an optical lattice—a series of pancake-shaped wells made of laser light. The world production of ytterbium is only about 50 tonnes per year, reflecting that it has few commercial applications. Experiments show that radiographs taken with a 169Yb source are roughly equivalent to those taken with X-rays having energies between 250 and 350 keV. The primary decay mode of ytterbium isotopes lighter than the most abundant stable isotope, 174Yb, is electron capture, and the primary decay mode for those heavier than 174Yb is beta decay. In 1878, the Swiss chemist Jean Charles Galissard de Marignac separated from the rare earth "erbia" another independent component, which he called "ytterbia", for Ytterby, the village in Sweden near where he found the new component of erbium. ytterbium is … Ytterbium(III) oxide is the chemical compound with the formula Yb 2 O 3. [36][37], Usually, low concentrations of ytterbium are used. Some ytterbium alloys have rarely been used in dentistry. The following uses for ytterbium are gathered from a number of sources as well as from anecdotal comments. Sujet et définition de mots fléchés et mots croisés ⇒ YTTERBIUM sur motscroisés.fr toutes les solutions pour l'énigme YTTERBIUM avec 2 lettres. As a result, the process is somewhat long. On a trouvé 1 solutions pour: Definition (noun) a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime Synonyms: atomic number 70, yb Connect with us on Facebook. (2) I have elements in there that I've never even contemplated using before - stuff like indium, tantalum, ytterbium , and praseodymium. In water it dissolves slowly, whereas in acids relatively fast. Ytterbium While examining samples of gadolinite, Marignac found a new component in the earth then known as erbia, and he named it ytterbia, for Ytterby, the Swedish village near where he found the new component of erbium. Translation for 'ytterbium' in the free English-French dictionary and many other French translations. Mixtures of powdered ytterbium with polytetrafluoroethylene or hexachloroethane burn with a luminous emerald-green flame. [18], The chemical behavior of ytterbium is similar to that of the rest of the lanthanides. In 1907, the French chemist Georges Urbain separated Marignac's ytterbia into two components: neoytterbia and lutecia. First, minerals such as monazite or xenotime are dissolved into various acids, such as sulfuric acid. Word Scramble - English word YTTERBIUM: words that start with ytterbium, words that end with ytterbium, anagrams of ytterbium, how to spell ytterbium!, Words with Friends, Scrabble [8] The +2 oxidation state occurs only in solid compounds and reacts in some ways similarly to the alkaline earth metal compounds; for example, ytterbium(II) oxide (YbO) shows the same structure as calcium oxide (CaO). [21] Ytterbium(III) fluoride (YbF3) is used as an inert and non-toxic tooth filling as it continuously releases fluoride ions, which are good for dental health, and is also a good X-ray contrast agent. There is a list of all Ytterbium(III) oxide nanopowder, <100 nm particle size (BET), ≥99.7% trace metals basis Yb 2 O 3 99.7 *Please select more than one item to compare Power scaling also requires optimization of matching passive fibers within the optical cavity. The +2 state has a valence electron configuration of 4f14 because the fully filled f-shell gives more stability. Ytterbium can then be separated from other lanthanides by ion exchange, as can other lanthanides. Exemple: "P ris", "P.ris", "P,ris" ou "P*ris" Rechercher. (3) It is extracted from its ores by heating lanthanum metal with ytterbium oxide. The clocks would be accurate within a second for a period comparable to the age of the universe. [46], Although ytterbium is fairly stable chemically, it is stored in airtight containers and in an inert atmosphere such as a nitrogen-filled dry box to protect it from air and moisture. YTTERBIUM Total Number of words Starting with YTTERBIUM found =2 YTTERBIUM comprises of 9 letters. Compounds of ytterbium are rare and have not yet been well characterized. [9] The price of ytterbium was relatively stable between 1953 and 1998 at about US $1,000/kg. It is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife.The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. [16][17], Ytterbium is separated from other rare earths either by ion exchange or by reduction with sodium amalgam. The chemical and physical properties of ytterbium could not be determined with any precision until 1953, when the first nearly pure ytterbium metal was produced by using ion-exchange processes. YTTERBIUM is itself is a word in english. Pas de bonne réponse? [25][26][27] The Commission on Atomic Mass, consisting of Frank Wigglesworth Clarke, Wilhelm Ostwald, and Georges Urbain, which was then responsible for the attribution of new element names, settled the dispute in 1909 by granting priority to Urbain and adopting his names as official ones, based on the fact that the separation of lutetium from Marignac's ytterbium was first described by Urbain. Licensed under Creative Commons Attribution 1.0 (Jurii). By clicking on, (9827 views - Periodic Table Of Elements), National Institute of Standards and Technology (NIST), "Atomic weights of the elements 2013 (IUPAC Technical Report)", Commission on Isotopic Abundances and Atomic Weights, "Standard Atomic Weight of Ytterbium Revised", "The NUBASE Evaluation of Nuclear and Decay Properties", "Un nouvel élément, le lutécium, résultant du dédoublement de l'ytterbium de Marignac", Ytterbium Atomic Clocks Set Record for Stability, "Photonic Whispering-Gallery Resonations in New Environments", "Fiber for Fiber Lasers: Matching Active and Passive Fibers Improves Fiber Laser Performance", "NIST ytterbium atomic clocks set record for stability", Creative Commons Attribution-Share-Alike License 3.0. Terbium is a chemical element with the symbol Tb and atomic number 65. Ytterbium metal behaves similarly to europium metal and the alkaline earth metals, dissolving in ammonia to form blue electride salts. This element is mined in China, the United States, Brazil, and India in form of the minerals monazite, euxenite, and xenotime. The optical clock based on it is exact to 17 digits after the decimal point. Its electrical resistivity increases ten times upon compression to 39,000 atmospheres (3.9 GPa), but then drops to about 10% of its room-temperature resistivity at about 40,000 atm (4.0 GPa). A list of words that start with Ytterbium (words with the prefix Ytterbium). [8], Ytterbium forms both dihalides and trihalides with the halogens fluorine, chlorine, bromine, and iodine. ytterbium intetkøn. Natural ytterbium is a mixture of seven stable isotopes, which altogether are present at concentrations of 3 parts per million. [10] However, the alpha allotrope is diamagnetic. Compare elements on more than 90 properties. The dihalides are susceptible to oxidation to the trihalides at room temperature and disproportionate to the trihalides and metallic ytterbium at high temperature:[8], Some ytterbium halides are used as reagents in organic synthesis. 27 radioisotopes have been observed, with the most stable ones being 169Yb with a half-life of 32.0 days, 175Yb with a half-life of 4.18 days, and 166Yb with a half-life of 56.7 hours. After some discussion, Marignac's name "ytterbium" was retained. Définition ou synonyme. It reacts slowly with cold water and it oxidizes slowly in air. It has the "rare-earth C-type sesquioxide" structure which is related to the fluorite structure with one quarter of the anions removed, leading to ytterbium atoms in two different six coordinate (non-octahedral) environments. Naturally occurring ytterbium (Yb) is composed of 7 stable isotopes, Yb-168, Yb-170, Yb-171, Yb-172, Yb-173, Yb-174, and Yb-176, with Yb-174 being the most abundant (31.83% natural abundance). [41] Ytterbium-doped LMA fibers also have the advantages of a larger mode field diameter, which negates the impacts of nonlinear effects such as stimulated Brillouin scattering and stimulated Raman scattering, which limit the achievement of higher power levels, and provide a distinct advantage over single mode ytterbium-doped fibers. [50], This article uses material from the Wikipedia article ytterbium meaning. bab.la arrow_drop_down bab.la - Online dictionaries, … Compare Products: Select up to 4 products. The metal is purified by sublimation and collected over a condensed plate. EurLex-2 EurLex-2 Shocktrykmålere, som kan måle tryk på over 10 GPa, herunder målere fremstillet af manganin, ytterbium og polyvinylidenbifluorid (PVBF, PVF2) Schokdrukmeters die geschikt zijn voor het meten van druk hoger dan 10 GPa, waaronder meters die zijn gemaakt met manganine, ytterbium [32], The kinetic of excitations in ytterbium-doped materials is simple and can be described within the concept of effective cross-sections; for most ytterbium-doped laser materials (as for many other optically pumped gain media), the McCumber relation holds,[33][34][35] although the application to the ytterbium-doped composite materials was under discussion.