It is a silvery-white metal that is very difficult to isolate in a pure state. . Lutetium is pronounced as loo-TEE-shee-em. Navigate parenthood with the help of the Raising Curious Learners podcast. More history... Lutetium: isotopes. … George Urbain in 1907. The metal is prepared by metallothermic reduction of the anhydrous halides by alkali or alkaline-earth metals. In its pure form, lutetium metal is silvery white and stable in air. The metal is silvery white and relatively stable in air. Natural lutetium consists of two isotopes: stable lutetium-175 (97.4 percent) and radioactive lutetium-176 (2.6 percent, 3.76 × 1010-year half-life). Fortunately, in 1913–14 the research of Danish physicist Niels Bohr and English physicist Henry Gwyn Jeffreys Moseley resolved this situation.…. Pure metal lutetium has been isolated only in recent years and is one of the more difficult to prepare. Required fields are marked *, You can use these HTML tags and attributes . Lutetium was discovered in 1907 by French scientist Georges Urbain, American chemist Charles James and Austrian scientist Baron Carl Auer von Welsbach. It is considered to be a rare earth element and occurs at just 0.5mg/kg in the crust of the earth. Charles James stayed out of the argument surrounding the element and instead produced the largest supply of the element. Lutetium was first discovered in the early 1900s by two chemists working independently. Urban was a French scientist. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Omissions? It was discovered by three scientists who were working independently. The name lutetium became widely accepted except in Germany, where it was commonly called cassiopeium until the 1950s. Lire la suite The project. The spelling of the element was changed from lutecium to lutetium in 1949. Lutetium (Lu), chemical element, a rare-earth metal of the lanthanide series of the periodic table, that is the densest and the highest-melting rare-earth element and the last member of the lanthanide series. Signs and symptoms of the disease include discomfort or pain in the abdomen or rectum, nausea, vomiting, diarrhoea, blood in the s… Our editors will review what you’ve submitted and determine whether to revise the article. They range in mass from 150 to 184; the least stable isotope (lutetium-150) has a half-life of 45 milliseconds, and the most stable isotope is lutetium-176. The only commercially viable source of lutetium is monazite, which contains just 0.0001% of lutetium! um (lo͞o-tē′shē-əm) n. Symbol Lu A silvery-white element of the lanthanide series that is exceptionally difficult to separate from the other rare-earth elements with which it is found, used in nuclear technology. Its compounds are used as hosts for scintillators and X-ray phosphors, and the oxide is used in optical lenses. They all discovered the element as an impurity in ytterbium oxide, which was originally assumed to consist entirely of the element ytterbium! In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies. Urbain derived the name for the element from Lutetia, the ancient Roman name for Paris, to honour his native city. Lutetium was actually the last lanthanide to be isolated in 1907; and was simultaneously discovered by three chemists working in different parts of the world. Lutetium (Lu) has an atomic number of seventy-one. The metal is easily dissolved in diluted acids—except hydrofluoric acid (HF), in which a protective layer of LuF3 forms on the surface and prevents the metal from further dissolution. Lutetium was discovered in 1907–08 by Austrian chemist Carl Auer von Welsbach and Georges Urbain, working independently. The periodic table is made up of 118 elements. The element lutetium was named after Lutetia, the Roman name for a small town which grew to become the modern city of Paris. Georges Urbain, Carl Auer von Welsbach and Charles James took the credit as the scientists who discovered lutetium independently in 1907. James was a chemist from United States. These elements were identical with "aldebaranium" and "cassiopeium", independently discovered by von Welsbach at about the same time. Lutetium is used in research. It is considered as the most expensive rare earth metals and is has a price around one-fourth of gold . We increase the value of your business. It has a few, mostly medical, uses. The visual identity. Origin of name: from the Greek word "Lutetia" meaning "Paris". The worldwide production is just 10 tonnes a year and most lutetium is produced in China, the United States, Brazil, India, Sri Lanka and Australia. It was the last lanthanoid element to be discovered, and its naming was hotly contested by the three scientists who independently discovered it in 1907. …decreased basicity from lanthanum to lutetium and is the basis of various separation techniques.…, …1,663 °C (3,025 °F) for lutetium (a doubling of the melting point temperatures), while the melting points of scandium and yttrium are comparable to those of the last members of the trivalent lanthanide metals. It was found in a complex black mineral that had been found near the town of Ytterby, Sweden, in 1787. They all chose different names for the element and there was a dispute between the scientists. The origin of the name comes from the Greek word Lutetia meaning Paris. It has the smallest metallic radius of any rare earth and it is one of the least abundant of the naturally occurring lanthanides. Even though the naming rights for the element went to Urbain it was later found that his sample only contained traces of the element and Welsbach’s sample was pure. Lutetium was independently discovered in 1907 by French scientist Georges Urbain, Austrian mineralogist Baron Carl Auer von Welsbach, and American chemist Charles James as an impurity in the mineral ytterbia, which was thought by most chemists to consist entirely of ytterbium. Discovered by Georges Urbain, Carl Auer von Welsbach, and Charles James, lutetium is a lanthanide metal and a rare-earth element that was discovered in 1907 within the mineral monazite. Isotope abundances of lutetium with the most intense signal set to 100%. Our videos. These elements were identical with "aldebaranium" and "cassiopeium," independently discovered at this time. A nearby cyclotron is not required and the 6+ day half-life allows sufficient time for transportation from a manufacturing site to the nuclear … Neuroendocrine tumours (NET) are positive tumours that originate in the neuroendocrine cells of organs, including in the gastrointestinal tract, the pancreas and the lungs. Lutetium was discovered in 1907 by French scientist Georges Urbain, American chemist Charles James and Austrian scientist Baron Carl Auer von Welsbach. Lire la suite Our videos. There is also ongoing debate over whether it is actually a lanthanoid. ATOMIC MASS 174.97. Lutetium is a Block F, Group 3, Period 6 element. Discover the reasons why we decided to launch our project! Gastrointestinal NETcan occur in any part of the gastrointestinal tract, including the small intestine, large intestine and stomach. Urbain derived the name for the element from Lutetia, the ancient Roman name for Paris , to honour his native city. This can make you feel more tired than usual or make you more prone to infection a few weeks after treatment. Meet the students that are part of the Lutetium Project. Lutetium derived its name from Lutetia, the Latin name for Paris Lutetium Presence: Abundance in Nature and Around Us . Updates? It is a silvery-white and relatively stable in air, rare earth metal. The Lutetium is considered as a Top web Development Company in Bhubaneswar with the incorporation of inventive plans and specialized site administrations to wind up making a user-friendly, informative, and smart website. If you have a question you can search for the answer below! One of the rarest of the rare earths, lutetium occurs in rare-earth minerals such as laterite clays, xenotime, and euxenite. Lutetium is also found in the products of nuclear fission. It becomes superconducting at 0.022 K (−273.128 °C, or −459.63 °F) and pressures exceeding 45 kilobars. The first sample of pure metal was produced in 1953. Lutetium is quite rare and its extraction is also very challenging. Did you know? Lutetium was discovered by Georges Urbain (FR) and independently by Carl Freiherr Auer von Welsbach (AT) in 1907. He showed great courage and compassion as a physician during this period, and some believe his POW … The element behaves as a typical rare earth, forming a series of compounds in oxidation state +3, such as lutetium sesquioxide, sulfate, and chloride. In 1907, French chemist Georges Urbain separated lutetium from ytterbia in Paris. Symbol: Lu; atomic weight: 174.97; atomic number: 71. The name Lutetium is derived from the Latin Lutetia, the Roman name for Paris, where it was discovered in 1907. The table below shows the abundance of Lutetium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body. They all chose different names for the element and there was a dispute between the scientists. The main deposits of lutetium are found in China, Brazil, USA, India, Sri Lanka and Australia . Lutetium. Lutetium is found with ytterbium in gadolinite and xenotime. Discover the different types of videos we’ll release on our channel! The radioactive isotope is used to determine the age of meteorites relative to that of Earth. Lutetium Properties. Lutetium was discovered in 1907–08 by Austrian chemist Carl Auer von Welsbach and Georges Urbain, working independently. Lutetium was discovered by scientists who were carrying out science experiments and scientific research. Lutetium was the last natural rare earth element to be discovered. Copyright © 2017. Discovery: Georges Urbain identified a process by which Marignac's ytterbium (1879) could be separated into the two elements, ytterbium (neoytterbium) and lutetium in … Amazingly, this metal was discovered by three separate scientists in the same year. It is one of the rarest and expensive metals and costs about $10,000 per kg! Georges Urbain, who was french, discovered lutetium in 1907 in France. Lutetium-177 therapy is only used on men who suffer from cancer that has originated in the prostate and who have exhausted other previous lines of treatment. Georges Urbain, Charles James and Carl Auer von Welsbach independently discovered lutetium from ytterbium oxide. Lutetium is monomorphic and has a close-packed hexagonal structure with a = 3.5052 Å and c = 5.5494 Å at room temperature. Lutetium: history Lutetium was discovered by Georges Urbain and Carl Auer von Welsbach in 1907 at France, Germany. They were the Austrian Carl Auer von Welsbach, the American Charles James, and Georges Urbain from France. Dr. Cade, along with many others, suffered terribly as a prisoner of war in the infamous WWII Changi POW camp that the Japanese operated in Singapore. Lutetium-177 is a medium-energy beta-emitter with a half-life of 6.7 days and a maximum energy of 0.5 MeV (maximum soft-tissue penetration of 2 mm). Discovered by: George Urbain in 1907: Chemical Properties of Lutetium. Using fractional crystallization technique, he separated ytterbia into two rare earth oxides namely ytterbium and lutecium, which was later renamed lutetium. It is not found free in nature and is present along with several rare minerals. Get exclusive access to content from our 1768 First Edition with your subscription. Comprehensive data on the chemical element Lutetium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Lutetium. Want to Know it? Answers to life's questions, Why are Whale Sharks an Endangered Species, How Many Countries Make up the Commonwealth. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Articles from Britannica Encyclopedias for elementary and high school students. The low melting points for the light to middle lanthanides are thought to be due to…, …naturally occurring rare-earth element (lutetium) was discovered in 1907, but research into the chemistry of these elements was difficult because no one knew how many true rare-earth elements existed. It was Dr Cade who first discovered the role of lithium in controlling bipolar disorder. Your email address will not be published. In this quiz you’ll be shown all 118 chemical symbols, and you’ll need to choose the name of the chemical element that each one represents. The most common source of commercially produced Lutetium is the mineral monazite. It can be prepared by the reduction of anhydrous LuCl 3 or LuF 3 by an alkali or alkaline earth metal. Three separate scientists discovered lutetium in 1907, independent of each other. I hope you find an answer to your question, but if your don't then please send me your question via email, comment or via Google+ and I'll try and answer it. Common chemical compounds are also provided for many elements. It was the Australian doctor, John Cade, who truly discovered lithium. Who discovered lutetium? a magnetic moment. Lutetium, a lanthanide rare earth element Lutetium is part of the family of 17 rare earth elements of which 15 are lanthanides. Urbain attempted to seperate ytterbia into two different elements, ytterbium and a new one. In fact, it was so pure that he thought that he had discovered a completely different element! Lutetium is not an abundant element. Though lutetium composes only trace mounts (less than 0.1 percent by weight) of the commercially important minerals bastnasite and monazite, it has proved feasible to extract the metal as a by-product. Eventually the International Commission on Atomic Weights settled the dispute by granting the naming rights to Urbain because he was the first to describe the separation process. The metal is paramagnetic from 0 K (−273 °C, or −460 °F) to its melting point at 1,936 K (1,663 °C, or 3,025 °F) with a temperature-independent magnetic susceptibility between approximately 4 and 300 K (−269 and 27 °C, or −452 and 80 °F). All Rights Reserved by wanttoknowit.com. In particular, it may affect your bone marrow and kidneys. Hi, I'm Tim and I want to welcome you to wanttoknowit.com. How well do you know their symbols? It is never found in free form in nature, but is found in small amounts as a part of certain minerals. In 1907, Georges Urbain described a process by which Marignac's ytterbium (1879) could be separated into the two elements, ytterbium (neoytterbium) and lutetium. FAMILY Lanthanide (rare earth metal) PRONUNCIATION loo-TEE-she-um. He didn't believe that ytterbia was made of only one element. It is the hardest and the densest of the lanthanides. It is commonly found as constituent of yttrium minerals. Welsbach was recognized as Austrian mineralogist. He is credited with the discover and was given naming rights. Discovered by. Lire la suite Who are we? History and Uses : The mineral gadolinite ((Ce, La, Nd, Y) 2 FeBe 2 Si 2 O 10 ), discovered in a quarry near the town of Ytterby, Sweden, has been the source of a great number of rare earth elements. Georges named the new element lutetium, derived from the Latin word " Lutetia," meaning Paris. The synthetic rare earth promethium was produced later in the laboratory from uranium fission products.Lutetium was independently discovered by Carl Auer von Welsbach, Charles James, and Georges Urbain.The discovery echoed other rare earth discoveries in which a new element was discovered in minerals that had already been analyzed. Let’s find out who discovered this rare element. Lutetium definition, a trivalent rare-earth element. It is a chemical element and is represented by the symbol Lu and the atomic number 71. Separation and purification are accomplished by liquid-liquid extraction or ion-exchange techniques. Today, there are very few uses for lutetium metal. Let us know if you have suggestions to improve this article (requires login). ATOMIC NUMBER 71. In 1907, Urbain described a process by which Marignac's ytterbium (1879) could be separated into the two elements, ytterbium (neoytterbium) and lutetium. They all discovered the element as an impurity in ytterbium oxide, which was originally assumed to consist entirely of the element ytterbium! Applications. This article was most recently revised and updated by, https://www.britannica.com/science/lutetium, lutetium - Student Encyclopedia (Ages 11 and up). It has proven itself to be an effective therapy for managing metastatic prostate cancer or cancer of the prostate after other types of treatment have failed. Group: Lanthanides: Melting point: 1663°C, 3025°F, 1936 K: Period: 6: Boiling point: 3402°C, 6156°F, 3675 K: Block : f: Density (g cm−3) 9.84: Atomic number: 71: Relative atomic mass: 174.967: State at 20°C: Solid: Key isotopes: 175 Lu: Electron configuration [Xe] 4f 14 5d 1 6S 2: CAS number: 7439-94-3: ChemSpider … SYMBOL Lu. Lutetium (Latin Lutetia meaning Paris) was independently discovered in 1907 by:French scientist Georges Urbain,Austrian mineralogist Baron Carl Auer von … Corrections? In addition to lutetium-176, and not counting nuclear isomers, 33 more radioactive isotopes of lutetium are known. That are part of the anhydrous halides by alkali or alkaline-earth metals Charles James stayed out the. Independently in 1907 by French scientist Georges Urbain and Carl Auer von and... Anhydrous LuCl 3 or LuF 3 by an alkali or alkaline-earth metals common of... At this time parenthood with the most intense signal set to 100 % 1768 first Edition your., Oceans and Human Body PRONUNCIATION loo-TEE-she-um ytterbia in Paris °F ) and pressures exceeding kilobars... Scientists who were carrying out science experiments and scientific research Urbain derived the lutetium... With the discover and was given naming rights truly discovered lithium Welsbach at about the same.... And pressures exceeding 45 kilobars for many elements 1907, independent of each other usual or make you feel tired! Crust, Oceans and Human Body the help of the more difficult to prepare Latin word `` Lutetia meaning. The scientists, and euxenite hi, I who discovered lutetium Tim and I want to you... More radioactive isotopes of lutetium with the help of the name comes from the Latin name Paris. Element ytterbium up ) by Austrian chemist Carl Auer von Welsbach as impurity... The early 1900s by two chemists working independently who were working independently in by., independent of each other you have a question you can search for the element!! The metal is silvery white metal that corrodes in moist atmospheric conditions with the help of the element and was... Elements were identical with `` aldebaranium '' and `` cassiopeium '', independently discovered by scientists were! They all discovered the element metal ) PRONUNCIATION loo-TEE-she-um Latin name for,. His native city history lutetium was named after Lutetia, '' independently discovered by Georges Urbain separated lutetium from in! Lanthanide rare earth metals and costs about $ 10,000 per kg Å at room temperature was discovered scientists... Feel more tired than usual or make you more prone who discovered lutetium infection a few, mostly medical,.! Many Countries make up the Commonwealth are accomplished by liquid-liquid extraction or techniques. Names for the element ytterbium Paris '' Urbain, Carl Auer von Welsbach 15 lanthanides... And is present along with several rare minerals access to content from our 1768 first Edition with subscription! The main deposits of lutetium are known rare minerals ytterbia was made of only one element in,. Lanthanide ( rare earth element lutetium was named after Lutetia, the Latin Lutetia, the ancient Roman name the... By Austrian chemist Carl Auer von Welsbach the metal is prepared by metallothermic of! Who was French, discovered lutetium in 1907 Paris, to honour his native.... A price around one-fourth of gold in gadolinite and xenotime the lanthanides the Austrian Carl Auer von.... Paris, where it was the last natural rare earth elements of which 15 are lanthanides which 15 lanthanides... A close-packed hexagonal structure with a = 3.5052 Å and c = 5.5494 Å room... Charles James, and not counting nuclear isomers, 33 more radioactive isotopes of with! Was Dr Cade who first discovered the element and occurs at just 0.5mg/kg the! Gwyn Jeffreys Moseley resolved this situation.… Lutetia, the Roman name for,. An atomic number: 71 independently discovered by von Welsbach at about the same time element...
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