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Evolution and Understanding of the D-Block Elements in the Periodic Table Cite This: Dalton Trans., 2019, 48, 9408 Edwin C
Dalton Transactions View Article Online PERSPECTIVE View Journal | View Issue Evolution and understanding of the d-block elements in the periodic table Cite this: Dalton Trans., 2019, 48, 9408 Edwin C. Constable Received 20th February 2019, The d-block elements have played an essential role in the development of our present understanding of Accepted 6th March 2019 chemistry and in the evolution of the periodic table. On the occasion of the sesquicentenniel of the dis- DOI: 10.1039/c9dt00765b covery of the periodic table by Mendeleev, it is appropriate to look at how these metals have influenced rsc.li/dalton our understanding of periodicity and the relationships between elements. Introduction and periodic tables concerning objects as diverse as fruit, veg- etables, beer, cartoon characters, and superheroes abound in In the year 2019 we celebrate the sesquicentennial of the publi- our connected world.7 Creative Commons Attribution-NonCommercial 3.0 Unported Licence. cation of the first modern form of the periodic table by In the commonly encountered medium or long forms of Mendeleev (alternatively transliterated as Mendelejew, the periodic table, the central portion is occupied by the Mendelejeff, Mendeléeff, and Mendeléyev from the Cyrillic d-block elements, commonly known as the transition elements ).1 The periodic table lies at the core of our under- or transition metals. These elements have played a critical rôle standing of the properties of, and the relationships between, in our understanding of modern chemistry and have proved to the 118 elements currently known (Fig. 1).2 A chemist can look be the touchstones for many theories of valence and bonding. -
The Rare Earths II
Redis co very of the Elements The Ra re Earth s–The Con fusing Years I A gallery of rare earth scientists and a timeline of their research I I James L. Marshall, Beta Eta 1971 , and Virginia R. Marshall, Beta Eta 2003 , Department of Chemistry, University of North Texas, Denton, TX 76203-5070, [email protected] The rare earths after Mosander. In the pre - vi ou s HEXAGON “Rediscovery” article, 1p we were introduced to the 17 rare earths, found in the f-block and the Group III chemical family of Figure 1. Important scientists dealing with rare earths through the nineteenth century. Johan Gadolin the Periodic Table. Because of a common (1760 –1852) 1g —discovered yttrium (1794). Jöns Jacob Berzelius (1779 –1848) and Martin Heinrich valence electron configuration, the rare earths Klaproth (1743 –1817) 1d —discovered cerium (1803). Carl Gustaf Mosander (1787 –1858) 1p —discovered have similar chemical properties, and their lanthanum (1839), didymium (1840), terbium, and erbium (1843). Jean-Charles deGalissard Marignac chemical separation from one another can be (1817 –1894) 1o —discovered ytterbium (1878) and gadolinium (1880). Per Teodor Cleve (1840 –1905) 1n — difficult. From preparations of the first two rare discovered holmium and thulium (1879). Lars Fredrik Nilson (1840 –1899) 1n —discovered scandium earth element s—yttrium and ceriu m—the (1879). Paul-Émile Lecoq de Boisbaudran (1838 –1912) —discovered samarium (1879) and dysprosium Swedish chemist Carl Gustaf Mosander (Figure (1886). 1b Carl Auer von Welsbach (1858 –1929) 1c —discovered praseodymium and neodymium (1885); 1, 2) was able to separate four additional ele - co-discovered lutetium (1907). -
Spectrophotometric Determination of Praseodymium by 1,4
Arab Journal of Sciences & Research publishing Issue (2), Volume (1) September 2015 ISSN: 2518 - 5780 Spectrophotometric Determination of Praseodymium by 1,4- Dihydroxyanthraquinone after its Selective Separation from Rosetta Monazite Rare Earth Concentrate by Solvent Extraction Abdel Fattah N. A a Sadeek A. S b Ali B. H a Abdo, A. A a Weheish, H. L.a a Nuclear Materials Authority || Egypt b Faculty of Science || Zagazig University || Egypt Abstract: A rare earths concentrate of Rosetta monazite assays about 44, 23, 16.94 and 5.91 % for Ce, La, Nd and Pr respectively. Separation of cerium by air oxidation at 200oC. Selective separation of Pr by D2EHPA at pH1 followed by a sensitive spectrophotometric method which described for the determination of praseodymium (Pr) with l,4- dihydroxyanthraquinone . The calibration curve was linear from 0.1 to 12 µgml -1 praseodymium. The influences of various parameters and reaction conditions for maximum colour development were investigated. The relative standard deviation for determination of 1 µgml-1 praseodymium has found to be 1.3 after 5 repeated determinations; percent error 5.02%, molar absorptivity (ε) was 1.23x106M-1 cm-1and detection limit was 0.1µgml-1. The method for determination of praseodymium showed good accuracy and selectivity. INTRODUCTION Rare earth elements (REEs), represent one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium (Connelly, N.G., et al., 2005). It was discovered of the black mineral Gadolinite by Carl Axel Arrhenius in 1787 (Gschneidner, and Cappellen, 1987). Traditionally, the REEs are divided into two groups on the basis of atomic weight; the light REEs are lanthanum through gadolinium (atomic numbers 57 through 64); and the heavy REEs comprise terbium through lutetium (atomic numbers 65 through 71). -
Yttrium Från Ytterby Och Litium Från Utö – Del 1 En Topografisk Karta Stockholm Vid 1200-Talets Slut
Grundämnenas upptäckt Grundämnenas upptäckt Exkursioner till Ytterby och Utö 6-7 juni eller 8-9 juni 6 juni Färje 1371: Strömkajen 08:30 Ytterby 09:30 09:45 – 10:45 Ytterby gruva Buss 682: Ytterby 11:03 Engarn 11:07 Buss 670: Engarn 11:09 Tekniska högskolan 11:44 Buss 4: Östra station 11:52 S:t Eriksplan 12:02 12:15 – 14:00 Rörstrands slott (lunch och visning) 14:00 – 16:00 Birkastan 7 juni Tåg 43: Stockholm City 08:16 Västerhaninge station 08:48 Buss 846: Västerhaninge station 09:09 Årstra brygga 09:22 Färje 2173: Årsta brygga 09:30 Gruvbryggan (Utö) 10:10 10:15 – 14:15 Rävstavik och Utö gruvor (matsäck) Färje 2178: Gruvbryggan (Utö) 14:30 Årsta brygga 15:25 Buss 846: Årstra brygga 15:32 Västerhaninge station 15:50 Tåg 43: Västerhaninge station 15:57 Stockholm City 16:29 Grundämnenas upptäckt Exkursioner till Ytterby och Utö 6-7 juni eller 8-9 juni 8 juni Färje 951: Strömkajen 09:15 Ytterby 10:40 10:55 – 11:45 Ytterby gruva Buss 682: Ytterby 12:03 Engarn 12:07 Buss 670: Engarn 12:09 Tekniska högskolan 12:44 Buss 4: Östra station 12:52 S:t Eriksplan 13:02 13:15 – 15:00 Rörstrands slott (lunch och visning) 15:00 – 17:00 Birkastan 9 juni Tåg 43: Stockholm City 08:16 Västerhaninge station 08:48 Buss 846: Västerhaninge station 09:09 Årstra brygga 09:22 Färje 2173: Årsta brygga 09:30 Gruvbryggan (Utö) 10:10 10:15 – 14:15 Rävstavik och Utö gruvor (matsäck) Färje 2178: Gruvbryggan (Utö) 14:30 Årsta brygga 15:25 Buss 846: Årstra brygga 15:32 Västerhaninge station 15:50 Tåg 43: Västerhaninge station 15:57 Stockholm City 16:29 -
GLOBAL RARE-EARTH PRODUCTION: HISTORY and OUTLOOK History – the Discovery
Center for Strategic and International Studies Rare Earth Elements: Geology, Geography, and Geopolitics James B. Hedrick Hedrick Consultants, Inc. U.S. Rare Earths, Inc. Burke, Virginia December 15, 2010 Washington, DC GLOBAL RARE-EARTH PRODUCTION: HISTORY AND OUTLOOK History – The Discovery . The rare earths were discovered in 1787 by Swedish Army Lieutenant Carl Axel Arrhenius . Carl, an amateur mineralogist collected the black mineral ytterbite, later renamed gadolinite, from a small feldspar and quartz mine at Ytterby, Sweden . With similar chemical structures the rare earths proved difficult to separate . It was not until 1794 that Finnish chemist Johann Gadolin separated the first impure yttrium oxide from the mineral ytterbite History – The Discovery History – The Commercialization . The rare earths were commercialized when the incandescent lamp mantle industry was established in 1884 with mantles of zirconium, lanthanum, and yttrium oxides with later improvements requiring only the oxides of thorium and cerium. The lamp mantle was discovered by Baron Carl Auer von Welsbach . The mantles also used small amounts of neodymium and praseodymium as an indelible brand name Welsbach label History – The Early Mining . Rare earths were first produced commercially in the 1880s with the mining in Sweden and Norway of the rare-earth thorium phosphate mineral monazite . Foreign Production Brazil produced monazite as early as 1887 India produced monazite starting in 1911 . Domestic Production Monazite production in the United States was first recorded in 1893 in North Carolina - a small tonnage of monazite was reportedly mined in 1887 Monazite mining in South Carolina began in 1903 History – The Processing . Three main methods for separating and refining the rare- earth elements since they were discovered . -
EMD Uranium (Nuclear Minerals) Committee
EMD Uranium (Nuclear Minerals) Committee EMD Uranium (Nuclear Minerals) Mid-Year Committee Report Michael D. Campbell, P.G., P.H., Chair December 12, 2011 Vice-Chairs: Robert Odell, P.G., (Vice-Chair: Industry), Consultant, Casper, WY Steven N. Sibray, P.G., (Vice-Chair: University), University of Nebraska, Lincoln, NE Robert W. Gregory, P.G., (Vice-Chair: Government), Wyoming State Geological Survey, Laramie, WY Advisory Committee: Henry M. Wise, P.G., Eagle-SWS, La Porte, TX Bruce Handley, P.G., Environmental & Mining Consultant, Houston, TX James Conca, Ph.D., P.G., Director, Carlsbad Research Center, New Mexico State U., Carlsbad, NM Fares M Howari, Ph.D., University of Texas of the Permian Basin, Odessa, TX Hal Moore, Moore Petroleum Corporation, Norman, OK Douglas C. Peters, P.G., Consultant, Golden, CO Arthur R. Renfro, P.G., Senior Geological Consultant, Cheyenne, WY Karl S. Osvald, P.G., Senior Geologist, U.S. BLM, Casper WY Jerry Spetseris, P.G., Consultant, Austin, TX Committee Activities During the past 6 months, the Uranium Committee continued to monitor the expansion of the nuclear power industry and associated uranium exploration and development in the U.S. and overseas. New power-plant construction has begun and the country is returning to full confidence in nuclear power as the Fukushima incident is placed in perspective. India, Africa and South America have recently emerged as serious exploration targets with numerous projects offering considerable merit in terms of size, grade, and mineability. During the period, the Chairman traveled to Columbus, Ohio to make a presentation to members of the Ohio Geological Society on the status of the uranium and nuclear industry in general (More). -
Hexagon Fall
Redis co very of the Elements The Rare Earth s–The Beginnings I I I James L. Marshall, Beta Eta 1971 , and Virginia R. Marshall, Beta Eta 2003 , Department of Chemistry, University of North Texas, Denton, TX 76203-5070, [email protected] 1 Rare earths —introduction. The rare earths Figure 1. The “rare earths” are defined by IUPAC as the 15 lanthanides (green) and the upper two elements include the 17 chemically similar elements of the Group III family (yellow). These elements have similar chemical properties and all can exhibit the +3 occupying the f-block of the Periodic Table as oxidation state by the loss of the highest three electrons (two s electrons and either a d or an f electron, well as the Group III chemical family (Figure 1). depending upon the particular element). A few rare earths can exhibit other oxidation states as well; for These elements include the 15 lanthanides example, cerium can lose four electrons —4f15d 16s 2—to attain the Ce +4 oxidation state. (atomic numbers 57 through 71, lanthanum through lutetium), as well as scandium (atomic number 21) and yttrium (atomic number 39). The chemical similarity of the rare earths arises from a common ionic configuration of their valence electrons, as the filling f-orbitals are buried in an inner core and generally do not engage in bonding. The term “rare earths” is a misnome r—these elements are not rare (except for radioactive promethium). They were named as such because they were found in unusual minerals, and because they were difficult to separate from one another by ordinary chemical manipula - tions. -
Evolution and Understanding of the D-Block Elements in the Periodic Table Cite This: Dalton Trans., 2019, 48, 9408 Edwin C
Dalton Transactions View Article Online PERSPECTIVE View Journal | View Issue Evolution and understanding of the d-block elements in the periodic table Cite this: Dalton Trans., 2019, 48, 9408 Edwin C. Constable Received 20th February 2019, The d-block elements have played an essential role in the development of our present understanding of Accepted 6th March 2019 chemistry and in the evolution of the periodic table. On the occasion of the sesquicentenniel of the dis- DOI: 10.1039/c9dt00765b covery of the periodic table by Mendeleev, it is appropriate to look at how these metals have influenced rsc.li/dalton our understanding of periodicity and the relationships between elements. Introduction and periodic tables concerning objects as diverse as fruit, veg- etables, beer, cartoon characters, and superheroes abound in In the year 2019 we celebrate the sesquicentennial of the publi- our connected world.7 Creative Commons Attribution-NonCommercial 3.0 Unported Licence. cation of the first modern form of the periodic table by In the commonly encountered medium or long forms of Mendeleev (alternatively transliterated as Mendelejew, the periodic table, the central portion is occupied by the Mendelejeff, Mendeléeff, and Mendeléyev from the Cyrillic d-block elements, commonly known as the transition elements ).1 The periodic table lies at the core of our under- or transition metals. These elements have played a critical rôle standing of the properties of, and the relationships between, in our understanding of modern chemistry and have proved to the 118 elements currently known (Fig. 1).2 A chemist can look be the touchstones for many theories of valence and bonding. -
From Bedrock to Porcelain a Study Regarding The
Bachelor Thesis Degree Project in Geology 15 hp From Bedrock to Porcelain A study regarding the history of porcelain, Ytterby mine and the discovery of yttrium in Sweden Timmy Kärrström Stockholm 2017 Department of Geological Sciences Stockholm University SE-106 91 Stockholm Sweden Abstract Porcelain is a translucent vitreous material that consists of clay (kaolin), feldspar and quartz which has been mixed and heated together to cause a metamorphic reaction. In Sweden, the Porcelain industry was established in 1726 at Rörstrands castle in Stockholm and is today one of the oldest industries in Europe to produce porcelain. Around the 1790’s Rörstrand got its feldspars and quartz from the Ytterby mine that was located at Resarö in Stockholm’s archipelago making the raw material somewhat easy to access. Rörstrand owned the mine in the 1850’s to 1926. During the time Ytterby mine was active, an amateur geologist by the name of Carl Axel Arrhenius, discovered an unusual black mineral in the quarry ore in 1787 which later led to the discovery of 8 new rare earth elements (REE) with the help of several Swedish chemists throughout time. These elements are Yttrium, Ytterbium, Gadolinium, Terbium, Thulium, Erbium, Holmium and scandium. This study will focus on the Swedish porcelain industry and how it has evolved throughout history and Rörstrand’s role in the discovery of yttrium. PAGE 1 Contents Abstract ........................................................................................................................................... 1 -
THE MAJOR RARE-EARTH-ELEMENT DEPOSITS of AUSTRALIA: GEOLOGICAL SETTING, EXPLORATION, and RESOURCES Figure 1.1
CHAPTER ONE WHAT ARE RARE- EARTH ELEMENTS? 1.1. INTRODUCTION latter two elements are classified as REE because of their similar physical and chemical properties to the The rare-earth elements (REE) are a group of seventeen lanthanides, and they are commonly associated with speciality metals that form the largest chemically these elements in many ore deposits. Chemically, coherent group in the Periodic Table of the Elements1 yttrium resembles the lanthanide metals more closely (Haxel et al., 2005). The lanthanide series of inner- than its neighbor in the periodic table, scandium, and transition metals with atomic numbers ranging from if its physical properties were plotted against atomic 57 to 71 is located on the second bottom row of the number then it would have an apparent number periodic table (Fig. 1.1). The lanthanide series of of 64.5 to 67.5, placing it between the lanthanides elements are often displayed in an expanded field at gadolinium and erbium. Some investigators who want the base of the table directly above the actinide series to emphasise the lanthanide connection of the REE of elements. In order of increasing atomic number the group, use the prefix ‘lanthanide’ (e.g., lanthanide REE: REE are: lanthanum (La), cerium (Ce), praseodymium see Chapter 2). In some classifications, the second element of the actinide series, thorium (Th: Mernagh (Pr), neodymium (Nd), promethium (Pm), samarium 1 (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), and Miezitis, 2008), is also included in the REE dysprosium (Dy), holmium (Ho), erbium (Er), thulium group, while promethium (Pm), which is a radioactive (Tm), ytterbium (Yb), and lutetium (Lu). -
Holmium Same As Santa’S Signature Hearty Laugh
Ho Ho Ho, Merry Christmas! It’s that time of the year, it’s Christmas time! Council of the 118 Elements I’m thrilled to introduce you to the element who has a chemical symbol the Santa Claus ~ Ho…Ho…Holmium same as Santa’s signature hearty laugh. Let’s give a warm welcome to Holmium in this chilly month of Christmas. Name Holmium He is a member of the Lanthanide series. The Lanthanides are put in a Atomic No. Atomic Weight disembodied block below the main body of the Periodic Table. It comprises 67 164.9303 15 elements with atomic numbers 57 to 71, from Lanthanum to Lutetium. Origin of the Name Home town of Cleve Holmia ‘Stockholm’ (the discoverer) Holmium has the highest magnetic strength of any element, and therefore is used to create the strongest artificially generated magnetic Melting Point 1461 °C Electronic fields. Another special trait is that he readily absorbs excess neutrons Arrangement Boiling Point 2720 °C 2,8,18,29,8,2 and so controls the chain reaction that fuels the nuclear reactor. Density 8.54 g/cm3 Humans also owe a huge thanks to Holmium for his Abundance 1.3 mg/kg significant contributions in the medical and dental fields. Category Metal Holmium lasers can produce a wavelength of light close to that of a microwave oven. Such electromagnetic radiation Discovery of the is efficiently absorbed by water molecules because it Santa Element Discoverer : Swede perfectly excites the hydrogen-oxygen bonds in water. Per Teodor Cleve Soft tissue in our bodies is largely made up of water and Year of Discovery: 1878 Cleve removed all of the known these lasers are energetic enough to cut through flesh. -
The Rare Earths I
The Mountain Pass rare earth ore body in Southern California, 86 km (54 mi) south-southwest of LasLas Vegas,Vegas, Nevada,Nevada, isis oneone ofof thethe largest,largest, richest,richest, andand mostmost readilyreadily mineablemineable rarerare earthearth depositsdeposits inin thethe worldworld (N35°(N35° 28.7428.74 W115°W115° 31.98).31.98). ItsIts provenproven andand probableprobable reservesreserves exceedexceed 1.31.3 millionmillion metricmetric tonstons ofof rarerare earthearth oxideoxide (REO)(REO) equivalentequivalent containedcontained inin 18.418.4 millionmillion metricmetric tonstons ofof oreore withwith ~8%~8% ore grade and a 5% cut-off grade. ItIt containscontains allall ofof thethe naturallynaturally occurringoccurring rarerare earthearth elements.elements. Photo,Photo, courtesycourtesy ofof Molycorp,Molycorp, Inc.Inc. Rediscovery ...pg 40 2016 Solicitation...pg 52 2015 Awards . ..pg 54 Collegiate News ...pg 57 FALL 2015 THE Rediscovering The Rare Earths A new series starts on page 40. Redis co very of the Elements The Rare Earth s–The Beginnings I I I James L. Marshall, Beta Eta 1971 , and Virginia R. Marshall, Beta Eta 2003 , Department of Chemistry, University of North Texas, Denton, TX 76203-5070, [email protected] 1 Rare earths —introduction. The rare earths Figure 1. The “rare earths” are defined by IUPAC as the 15 lanthanides (green) and the upper two elements include the 17 chemically similar elements of the Group III family (yellow). These elements have similar chemical properties and all can exhibit the +3 occupying the f-block of the Periodic Table as oxidation state by the loss of the highest three electrons (two s electrons and either a d or an f electron, well as the Group III chemical family (Figure 1).