Thulium is a chemical element with the symbol Tm and atomic number 69. Only one allotropic (structural) form is known for thulium. Define thulium. Thulium is an inner transition element, a lanthanide metal, and a rare earth element that was discovered in the late 1800s. thulium 2006, Bogen Om Grundstofferne, Gyldendal Uddannelse →ISBN, page 149 Herefter skæres tantalhylsteret af på en drejebænk, og stangen af thulium er klar til salg. Thulium element is also used in Surgical equipment like laser. Thulium meestal bestaat uit driewaardige toestand Tm3+. Thulium oxide (Tm 2 O 3) Thulium Iodide (TmI 3) Interesting facts: It is the least abundant of the rare earth metals. Thulium – Properties Thulium is vooral gevaarlijk in de werkomgeving, omdat de dampen en gassen met de lucht ingeademd kunnen worden. Het is een zilverwit lanthanide Woordherkomst Romeinse naam verwijzend naar een mytisch land in het verre noorden, vermoedelijk "Scandinavië". Thulium is used to dope yttrium aluminum garnets (YAG) used in lasers. Although the only naturally occurring isotope (thulium-169) is stable, there are 15 unstable isotopes. It is somewhat resistant to corrosion in dry air. One was thulium, after Thule, which in classic legend was the land farthest to the north, and which was interpreted by later Europeans as representing Scandinavia. 32 radioactive isotopes of thulium have been produced, with atomic masses ranging from 146 to 177. Our goal is to envision what’s next, rather than what’s new, and … Thulium kan worden gebruikt om lasers te maken, maar door de hoge kosten van dit metaal zijn de toepassingsmogelijkheden gering. Thulium laser is effectief De Thulium laser kan zowel incideren als vaporiseren. thulium - Zelfstandignaamwoord 1. Thulium’s focus is B2B and Enterprise. Thulium does not offer a free trial. Thulium is not toxic, although it has no known biological function. Like the other lanthanides, the most common oxidation state is +3, seen in its oxide, halides and other compounds; because it occurs so late in the series, however, the +2 oxidation state is also stabilized by the nearly full 4f shell that results. Thulium is the thirteenth and third-last element in the lanthanide series. Metallic thulium is relatively expensive and has only recently become available. What is Thulium. De thulium Tm3+ ionen geven een sterke blauwe luminescentie als de elektronen van baan veranderen. Thulium is an easily workable metal with a bright silvery-gray luster. Het gebruik van de thulium laser gebeurt met hetzelfde vertrouwde werkelement als TURP en biedt naast het vaporiseren van weefsel de mogelijkheid om chips (PA) te snijden, enuclatie of resectie van de prostaat uit te voeren. About Thulium. It is fairly soft and slowly tarnishes in air. Thulium was discovered in 1879 by P. T. Cleve. See additional pricing details below. Thulium is used in euro banknotes for its blue fluorescence under UV light to defeat counterfeiters. He isolated two new oxides, which eventually led to the identification and naming of the elements holmium and thulium. Thulium wordt doorgaans slechts in twee soorten ertsen gevonden. Thulium (pronounced as Thoo-lee-em) [2] is a soft, silver-gray rare earth metal [3] belonging to the Lanthanides group and represented by the symbol Tm [1].While its most abundant, naturally occurring isotope is 169 Tm, it has 34 radioactive isotopes, out of which the most stable one is 171 Tm with a half-life period of 1.92 years [4]. == Ontdekking == In 1879 is thulium ontdekt door de Zweedse chemicus Per Teodor Cleve tijdens het bestuderen van onzuiverheden in lanthanideoxiden. ↑ "thulium" in: Sijs, Nicoline van der, Chronologisch woordenboek. Lanthaniden ook wel bekend als zeldzame aardmetalen, verwijst een nu verouderde term voor deze elementen met vele gedeelde chemische en fysische eigenschappen. Thulium is stable in air, but reacts slowly with water, and rapidly with acids. Natuurlijk voorkomende thulium bestaat uit de stabiele isotoop Tm-169. They do not have a free version. Thulium (Tm) is een element met atoomnummer 69, het is het zeldzaamst van de natuurlijk voorkomende zeldzame aarden. Thulium is a chemical element that has the symbol Tm and atomic number 69. Thulium-170 (half-life about 129 days), prepared by irradiating thulium-169 in a nuclear reactor, emits X rays; it is used in portable X-ray sources. (scheikunde), (element) scheikundig element met symbool Tm en atoomnummer 69. This isotope is used in X-ray machine. Thulium is a soft silver-white metal. The following uses for thulium are gathered from a number of sources as well as from anecdotal comments. It is the thirteenth and third-last element in the lanthanide series. (Image credit: Images of elements) Sources of thulium. Enkele andere zeldzame toepassingen zijn: Na een bombardement met neutronen kan thulium worden gebruikt als bron van röntgenstraling. Abundance and Isotopes. Het is een zilverwit lanthanide. Thulium is een scheikundig element in de lanthanide groep op het periodiek systeem der elementen. Thulium … Common Uses: It is an easily workable metal with a bright silvery-gray luster. I would be delighted to receive corrections as well as additional referenced uses.. 169 Tm bombarded in a nuclear reactor can be used as a radiation source in portable X-ray equipment; natural thulium has possible use in ferrites (ceramic magnetic materials) used in microwave equipment Thulium is a silvery metal, so soft it can be cut with a knife. : modern Latin, from Latin Thule (a country described by the ancient Greek explorer Pytheas), from Greek Thoulē , of unknown origin. Thulium atoms have 69 electrons and the shell structure is 2.8.18.31.8.2. The most common oxidation state of thulium is Tm 3+. Thulium, 1 meaning, Noun: A metallic chemical element (symbol Tm) with an atomic number of 69. Some people consider it the most useless of all naturally occurring elements, though others will … Natural thulium consists of one stable isotope, Tm-169. Thulium is among the most obscure elements in the periodic table. Ultrapure crystalline thulium, 22.3 grams. Thulium definition is - a soft silvery metallic element of the rare-earth group. Thulium, holmium, and samarium According to Righter's proposal, elements such as tin, zinc, indium, cadmium and thulium may be found in lower concentrations on the mantle of the Moon since they never re-condensed following the impact. Dit kan een longembolie als gevolg hebben. Thulium is the least abundant of the naturally occurring rare earth elements. It currently has no commercial applications, although one of its isotopes, thulium-169, could be used as a radiation source for portable X-ray machines. The ground state electronic configuration of neutral thulium is [Xe].4f 13.6s 2 and the term symbol of thulium is 2 F 7/2.. Thulium: description Your user agent does not support the HTML5 Audio element. De ouderdom en herkomst van onze woorden en betekenissen, 2e druk, Amsterdam / Antwerpen: Veen, 2002; op website dbnl.org; ISBN 90 204 2045 3 Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. Its stable isotope, Tm-169, is the only form that occurs naturally. ; Er zijn aanwijzingen dat thulium kan worden gebruikt in magnetische keramische materialen. Het gebruik van thulium neemt nog steeds toe, omdat het zeer geschikt is om katalysatoren te produceren en glas te polijsten. Thulium. This lesson explains the properties and uses of this element. Thulium Thulium is een scheikundig element met symbool Tm en atoomnummer 69. Thulium is a social media marketing agency focused in strategy and analytics, developing influencer programs to make companies number 1 in their peer group. Other articles where Thulium-170 is discussed: thulium: …neutrons, natural thulium becomes radioactive thulium-170 (128.6-day half-life), which ejects soft gamma radiation with wavelength commensurate with laboratory hard X-ray sources. Thulium was discovered by Per Theodor Cleve, a Swedish chemist, in 1879. Word Origin late 19th cent. Thulium is also used in alloys with other rare earth metals. It is easy to work with and can be cut with a knife. Thulium pricing starts at $26.38 per month, per user. Comprehensive information for the element Thulium - Tm is provided by this page including scores of properties, element names in many languages, most known nuclides and … Thulium belongs to the Lanthanide family. Thulium Pricing Overview. Thulium was discovered by Swedish chemist Per Teodor Cleve in 1879 when he was looking for impurities in samples of rare earth oxides. Thulium is the second least abundant of the lanthanides (promethium is only found in trace quantities on Earth). This trivalent ion most commonly forms green compounds. thulium synonyms, thulium pronunciation, thulium translation, English dictionary definition of thulium. Name: Thulium Symbol: Tm Atomic Number: 69 Atomic Mass: 168.9342 amu Melting Point: 1545.0 °C (1818.15 K, 2813.0 °F) Boiling Point: 1727.0 °C (2000.15 K, 3140.6 °F) Number of Protons/Electrons: 69 Number of Neutrons: 100 Classification: Rare Earth Crystal Structure: Hexagonal Density @ 293 K: 9.321 g/cm 3 Color: silverish Atomic Structure It has very few applications. Abundance earth’s crust: 0.5 parts per million by weight, 50 parts per billion by moles Thulium metal produces isotopes that emits X-rays. This piece is 2.5 by 3 centimeters. Toepassingen. 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