| 单词 | lanthanum |
| 例句 | Loeb says traces of three rare elements — beryllium, lanthanum and uranium — suggest the spheres come from outside of our solar system. Harvard professor Avi Loeb says he found interstellar objects in the deep sea. Others are skeptical 2023-09-01T04:00:00Z However, five of the spherules were unusually enriched in beryllium and lanthanum, and, to a lesser degree, uranium. Did interstellar debris fall to the sea floor? Claim meets sea of doubt 2023-08-30T04:00:00Z The 17 elements are: lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium. Explainer-China's rare earths dominance in focus after mineral export curbs 2023-07-05T04:00:00Z A quantum leap forward came in early 1986, when they created lanthanum barium copper oxide, a ceramic that became superconductive at about minus 400 degrees Fahrenheit. K. Alex Müller, Innovator in Ceramic Superconductors, Dies at 95 2023-01-18T05:00:00Z Among the products of Meitner, Hahn, and Strassman’s fission reaction were barium, krypton, lanthanum, and cerium, all of which have nuclei that are more stable than uranium-235. Chemistry 2019-02-14T00:00:00Z Over the next 3 years, Eremets and others boosted the Tc as high as 250 K in hydrides containing the heavy metal lanthanum. Thanks to a bit of diamond smashing, practical superconductivity could be close to reality 2021-08-26T04:00:00Z Tanbreez says half the rare earth metals it mines would be lanthanum and cerium - relatively plentiful metals used in telescope lenses and auto catalysts to cut emissions. Mining magnets: Arctic island finds green power can be a curse 2021-03-02T05:00:00Z Scientists previously determined continental thickness by looking at the relative amounts of the elements lanthanum and ytterbium in the rocks, Tang says. Earth’s mountains may have mysteriously stopped growing for a billion years 2021-02-11T05:00:00Z These 17 elements, with daunting names like yttrium, lanthanum, neodymium and gadolinium, are sparsely distributed in the Earth’s crust. These Microbes May Help Future Martians and Moon People Mine Metals 2020-11-11T05:00:00Z Because lanthanum behaves very much like the lanthanide elements, it is considered a lanthanide element, even though its electron configuration makes it the first member of the third transition series. Chemistry 2019-02-14T00:00:00Z The first class includes repeating cagelike structures made from hydrogen atoms, with each cage enclosing an electron-rich metal atom, such as lanthanum or yttrium. Thanks to a bit of diamond smashing, practical superconductivity could be close to reality 2021-08-26T04:00:00Z The detected isotopes of barium, strontium and lanthanum would be created in the core of a nuclear reactor, which produces energy by splitting uranium atoms in a chain reaction. How nuclear scientists are decoding Russia’s mystery explosion 2019-08-29T04:00:00Z When lanthanum in La2CuO4 is partially replaced with barium, electron vacancies called holes are introduced into the system in a process known as doping. Superconductivity seen in a non-magnetic nickel oxide 2019-08-27T04:00:00Z Russia’s state weather and environmental monitoring agency said Monday the brief rise in radiation levels was caused by a cloud of radioactive gases containing isotopes of barium, strontium and lanthanum that drifted across the area. Russian agency reveals details of radiation after explosion 2019-08-26T04:00:00Z Russia’s state weather and environmental monitoring agency said Monday the brief rise in radiation levels was caused by a cloud of radioactive gases containing isotopes of barium, strontium and lanthanum that drifted across the area. Russian agency reveals details of radiation after explosion 2019-08-26T04:00:00Z Oil refinery operators temporarily stopped using the rare earth element lanthanum, which improves oil refining efficiency, when the price went up. Don't Panic About Rare Earth Elements 2019-05-31T04:00:00Z They include elements like gadolinium, lanthanum, cerium and promethium, and are vital in the production of cancer treatment drugs, smartphones and renewable energy technologies. US-China trade: what are rare-earth metals, and what's the dispute? 2019-05-29T04:00:00Z Rare earth metals are a group of 17 elements - lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium - that appear in low concentrations in the ground. Explainer: China's rare earth supplies could be vital bargaining... 2019-05-22T04:00:00Z The common features of these hydrogen sulfide and lanthanum hydride superconductors are that they are rich in hydrogen and that superconductivity emerges only under pressures above about one million times atmospheric pressure. Superconductivity near room temperature 2019-05-21T04:00:00Z Traditionalists maintain that these comprise scandium, yttrium, lanthanum and actinium; a growing number thinks that lutetium and lawrencium should replace the last two on the basis of electronic structures. Can quantum ideas explain chemistry’s greatest icon? 2019-01-29T05:00:00Z In order to search for other such materials scientists needed just to consult the periodic table in order to predict that compounds in which yttrium was replaced by lanthanum would also be high-temperature superconductors. Happy Sesquicentennial, Periodic Table! 2019-01-22T05:00:00Z They used the anvil’s diamond tips to squeeze a minuscule sample of lanthanum and hydrogen to pressures of up to 200 gigapascals. First hint of near-room-temperature superconductor tantalizes physicists 2018-12-18T05:00:00Z The screen was polished with lanthanum and cerium. How Rare Earths (What?) Could Be Crucial in a U.S.-China Trade War 2018-07-11T04:00:00Z Drozdov et al.1 report an experiment in which a tiny sample of lanthanum is enclosed inside a hole in a thin metal foil. Superconductivity near room temperature 2019-05-21T04:00:00Z Metals firms began recycling more lanthanum, dysprosium and other coveted elements from industrial waste. China’s Rare-Earths Bust 2016-07-18T04:00:00Z This is because lanthanum lies one place below yttrium in the periodic table. Happy Sesquicentennial, Periodic Table! 2019-01-22T05:00:00Z It also plans to court more Japanese customers, specifically for its lanthanum and cerium products, used in petroleum refining and catalytic converters respectively. Lynas CEO Digs In as Rare-Earth Prices Slump 2015-09-01T04:00:00Z In February, Molycorp said Mountain Pass production in the fourth quarter of 2014 — including praseodymium and neodymium for use in magnets and lanthanum for — nearly doubled from the previous quarter. Molycorp -- sole U.S. rare earth producer -- files for bankruptcy 2015-06-25T04:00:00Z The sample is squeezed between two diamonds and transforms into lanthanum hydride at high pressure. Superconductivity near room temperature 2019-05-21T04:00:00Z And we do know where the lanthanum oxide comes from, currently from Baotou in Inner Mongolia. Apple's Indentured Servitude, I Pencil And The Socialist Calculation Problem 2013-11-08T16:25:00Z There are 17 rare earths in total, such as lanthanum and cerium. Lynas shares rise on Malaysian poll 2013-05-06T02:46:48Z His group layered conducting lanthanum nickelate and insulating lanthanum aluminate and found that the composite underwent a transition between the two properties. Metal oxide chips show promise 2013-03-06T18:20:29.690Z Rare-earth minerals such as lanthanum, lutetium, yttrium, and scandium used to be mined and processed primarily in the United States. As Defense Bill Moves to Vote, Researchers Review Results on Cancer, Satellite, and Other Science Provisions 2012-12-20T19:55:00Z The authors overcame these experimental challenges and uncovered crucial evidence that confirms the high-temperature superconductivity in lanthanum hydride compounds. Superconductivity near room temperature 2019-05-21T04:00:00Z We might say that that lanthanum oxide is from mine to glass maker to lens maker to camera maker to Flextronics the assembler to Apple: six degrees of separation. Apple's Indentured Servitude, I Pencil And The Socialist Calculation Problem 2013-11-08T16:25:00Z There are 17 rare earths in total, such as lanthanum and cerium, and their production is currently dominated by China. Rare earths plant gets go ahead 2012-11-08T10:37:34Z These are a group of 17 minerals with names like lanthanum, yttrium and neodymium which are essential in a wide range of modern technology, from hybrid car batteries to low-energy light bulbs. Lynas learns fate for Malaysia rare earth refinery 2012-10-09T21:57:24Z Not to mention rare elements such as lanthanum, cerium, and neodymium, essential to modern technology and commanding highest prices. Afghanistan’s Risky Mining Bonanza 2012-07-04T08:45:00Z Drozdov et al. observed this isotope effect and found that, compared with the lanthanum hydride samples, the critical temperature in lanthanum deuteride samples is lower by almost exactly the amount predicted by the theory. Superconductivity near room temperature 2019-05-21T04:00:00Z Cerium and lanthanum account for 81 percent of Molycorp’s shipments, Chief Executive Officer Mark Smith said Nov. 30. Short Sellers Place Record Bet on Molycorp as Rare Earths Sink 2011-12-05T10:54:19Z EVs and hybrid vehicles will use materials such as lithium and rare earth metals like neodymium and lanthanum. Megabets And Megarisks: Remaking The Auto Industry 2011-11-29T06:14:18Z So far, geologists say, they have mapped one million metric tons of these critical elements, which include lanthanum, cerium and neodymium. Afghanistan Holds Enormous Bounty of Rare Earths, Minerals 2011-09-29T17:45:05.640Z Prices for cerium and lanthanum, the most abundant rare- earth elements, will drop by 50 percent in 12 months, Christopher Ecclestone, an analyst at Hallgarten & Co. in New York, has forecast. Rare Earths Fall as Toyota Develops Alternatives: Commodities 2011-09-29T02:26:16Z But the hydrogen sulfide and lanthanum hydride experiments were motivated by computational results that anticipated both the necessary pressures and the resulting critical temperatures9,12. Superconductivity near room temperature 2019-05-21T04:00:00Z The category covers 17 chemically similar metals include lanthanum, cerium and neodymium. China Increases Rare-Earth Export Quota; EU Criticizes Move 2011-07-15T06:00:39Z Lithium, neodymium and lanthanum, all crucial materials used in hybrid cars, are imported primarily from China. Megabets And Megarisks: Remaking The Auto Industry 2011-11-29T06:14:18Z These 17 chemically similar metals include lanthanum, cerium and neodymium, and are used in products including Boeing Co. helicopter blades, Raytheon Co. missiles, Toyota Motor Corp. hybrid cars and wind turbines. China Almost Doubles Rare-Earth Export Quota; EU Criticizes Move 2011-07-14T17:05:56Z Grace & Co. began selling this year an oil-refining catalyst with reduced lanthanum, a rare earth that has increased in price more than fourfold in the past year. Rare Earths Fall as Toyota Develops Alternatives: Commodities 2011-09-29T02:26:16Z Australian miner Lynas said it plans to get a pre-operation licence by September for production of four light rare earths: neodymium, cerium, praseodymium and lanthanum. Sumitomo says to close Molycorp deal once customers secured 2011-06-17T12:29:44Z China’s Inner Mongolia Baotou region produces so-called light rare earths such as lanthanum, cerium and samarium. Rare Earth Prices Double on China, Industrial Minerals Says 2011-06-17T06:05:38Z China’s Inner Mongolia Baotou region produces so- called light rare earths such as lanthanum, cerium and samarium. Rare Earth Prices Double on China, Industrial Minerals Says 2011-06-17T03:41:30Z Some of Weder's group's experimental materials, which include metal ions such as zinc or lanthanum in a rubbery polymer, were able to regain their original toughness after light-induced repairs. Heal thyself: Rubbery polymer self-repairs under light exposure 2011-04-20T22:45:00.267Z They then spiked their mixture with positively charged metals, either zinc or lanthanum. Plastic Heal Thyself 2011-04-20T18:27:14Z To be sure, prices of some rare earths, including lanthanum, may start to drop by 2013 as additional production creates a “vast oversupply,” Western Minerals Group Ltd., a Canadian exploration company, forecast last month. Lynas’s Nick Curtis Builds Fortune With Bet on Rare Earths 2011-03-07T19:13:38Z The rare-earth elements are 17 chemically similar metals, such as lanthanum, neodymium and dysprosium. Molycorp Surges as China Raises Rare Earth Deal Stakes: Real M&A 2011-03-07T00:14:39Z The magnets that drive a Toyota Prius hybrid’s electric motor use around 1 kilogram of neodymium, while 10 – 15 kg of lanthanum is used in its battery. Endangered Elements Pose Threat To Green Energy 2011-02-01T20:04:13Z Rare earths are 17 chemically similar elements including neodymium, cerium and lanthanum that are used in the production of electronics. China Cuts Export Quotas for Rare Earths 11% in First Round 2010-12-28T15:40:02Z Rare earths, a group of 17 metallic elements including yttrium and lanthanum used in small quantities to enhance batteries, computer and weapons systems, and other applications, are generally found together. China denies banning rare earths exports to Japan 2010-09-23T07:55:00Z Monazite is a mineral consisting of phosphates of cerium, lanthanum, thorium, and other rare earths in varying proportions. The Economic Aspect of Geology On treating with oxalic acid, cerium, lanthanum, and didymium are precipitated as oxalates, which on ignition are converted into oxides. A Text-book of Assaying: For the Use of Those Connected with Mines. Who, then, will be the first to discover a use for indium, germanium, terbium, thulium, lanthanum, neodymium, scandium, samarium and others as unknown to us as tungsten was to our fathers? Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries The separation of lanthanum and didymium in the solution from which the cerium has been precipitated is effected by precipitating them together as oxalates, igniting, and dissolving in dilute nitric acid. A Text-book of Assaying: For the Use of Those Connected with Mines. |
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