Rare earth | Definition of Rare earth at Dictionary.com

Rare earth definition, the oxide of any of the rare-earth elements contained in various minerals. See more. Rare earth | Definition of Rare earth at Dictionary.com

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Rare Earth Reference for Wavelength in the Far UV, NIST ...

The Rare Earth reference is measured against an air blank. Periodically check the spectra. The periodic use of your Rare Earth cell will build a log of your instrument's wavelength accuracy for use with certification and troubleshooting should the correlation change over time.

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Rare Earth Elements - Bünzli - - Major Reference Works ...

May 25, 2018· The full text of this article hosted at iucr.org is unavailable due to technical difficulties.

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Rare earth element mix for ICP TraceCERT®, 16 elements, 50 ...

Rare earth elements is a group of elements that expands from lanthanum to lutetium, which exhibit similar physical and chemical properties.It can be found in rocks and minerals. This certified reference material (CRM) is produced and certified in accordance with ISO/IEC 17025 and ISO 17034 (ISO Guide 34). This CRM is traceable to SI unit kg and ...

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Synthetic zircon doped with hafnium and rare earth ...

Jun 26, 2011· A series of flux-grown synthetic zircon crystals doped with Hf and selected rare earth elements (REE) were produced for use as a potential reference material for Lu–Hf isotopic analysis of zircon by in situ laser ablation multi-collector inductively …

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REE-1 Certificate of Analysis | Natural Resources Canada

REE-1 is suitable for the analysis of rare earth elements, zirconium, niobium and various other elements in ores in concentrations ranging from major to minor to trace levels. Examples of intended use include quality control and method development. Instructions for use. REE-1 …

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Rare Earths - The New York Times

Jul 11, 2018· News about rare earths. Commentary and archival information about rare earth metals and rare earth minerals from The New York Times. NYTimes.com no …

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Rare-earth element - Wikipedia

A rare-earth element (REE) or rare-earth metal (REM), as defined by IUPAC, is one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium. Scandium and yttrium are considered rare-earth elements because they tend to occur in the same ore deposits as the lanthanides and exhibit similar chemical properties.

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Rare Earths, the U.S.-China Trade War and Your Phone ...

May 20, 2019· The U.S. relied on China for about four of every five tons of rare-earths imports between 2014 and 2017 and last year purchased $160 million-worth, up 17% from a year earlier. ... The Reference Shelf.

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Rare Earth Elements - Rare Element Resources

rare-earth metals, in chemistry, group of metals including those of the lanthanide series [1] and actinide series [2] and usually yttrium [3], sometimes scandium [4] and thorium [5], and rarely zirconium [6]. Promethium, which is not found in nature, is not usually considered a rare-earth metal.

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Rare earth metals - Credo Reference

Rare earth metals in chemistry, group of metals including those of the lanthanide series and actinide series and usually yttrium , sometimes scandium and thorium , and rarely zirconium . Promethium, which is not found in nature, is not usually considered a rare-earth metal. The metals usually occur together in

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Rare-earth element | Definition of Rare-earth element at ...

Rare-earth element definition, any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. See more.

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Rare Earth ICP-MS Standard - 125 mL - CMS-1-125ML

Inorganic Ventures' Rare Earth ICP-MS Standard is a 125mL certified reference material set in a nitric acid matrix for stability. This standard is Traceable to NIST and manufactured in accordance with our stringent Quality Assurance guidelines. One year Expiration Date.

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Far UV Rare Earth Wavelength Reference | White Bear Photonics

The Far UV Rare Earth Wavelength Reference uses Rare Earth sulfate (0.05%) in sulfuric acid (0.03%) sealed in a quartz cell, NIST Traceable with UKAS ISO 17025 accredited certificate of calibration. Its primary usage is to validate the Far UV wavelength scale of spectrophotometers, with a usable range of 200nm to 260nm, spectral bandpass of 3nm or less.

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SAGE Reference - Rare Earth Elements

A global map of rare earth producers, including element production, production under development, and rare earth deposits. Before World War II, most of the world's rare earths were sourced from placer sand deposits in India and Brazil.

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The Rare Earth Hypothesis - Montana State University

You may wish to refer to this book for a more detailed description of the Rare Earth hypothesis. Scientists generally agree that the Earth formed about 4.5 billion years ago yet complex life has existed on the Earth for about the last 500 million years.

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What are rare earth elements – and what ... - HowStuffWorks

Rare earths get no respect. Stuck near the bottom of the periodic table of the elements, and given unpronounceable names like praseodymium and ytterbium, they have nowhere near the glamour and popularity that oxygen, nitrogen, carbon and the other chart-toppers do. Heck, even zirconium -- …

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Biogeochemistry of the rare-earth elements with particular ...

Hickory trees concentrate the rare-earth elements in their leaves to a phenomenal degree and may contain as much as 2300 p.p.m. of total rare earths based on the dry weight of the leaves. The average proportions of the individual elements (atomic percent of the total rare-earth elements) in the leaves are: Y 36, La 16, Ce 14, Pr 2, Nd 20, Sm 1, Eu 0.7, Gd 3, Tb 0.6, Dy 3, Ho 0.7, Er 2, Tm 0.2 ...

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rare earth - WordReference.com Dictionary of English

Forum discussions with the word(s) "rare earth" in the title: metals - rare earth more than 80 percent of the world’s rare-earth elements in China. Visit the English Only Forum. Help WordReference: Ask in the forums yourself. Look up "rare earth" at Merriam-Webster

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Normalized Rare Earth Elements in Water, Sediments, and ...

The rare earth elements (REE), or lanthanide elements, are a group of 14 elements that have similar crystal ionic radii and valance state. They have a decreasing crystal ionic radius from La (1.016 Å) to Lu (0.85 Å) and a sin- gle 3+ valence within the siliciclastic fraction of sedi-

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Rare Earths - Ucore Rare Metals Inc.

Rare Earths . Rare Earths include the unique elemental suite known as the Rare Earths Elements (REE’s) and a select group of specialty metals produced primarily for technology applications. At Ucore, our focus is on Heavy REE’s (a class of REE’s known for their high value relative to other REE’s) and collateral metals often found in ...

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Rare Earth Frontiers, From Terrestrial Subsoils to Lunar ...

"Rare Earth Frontiers. could easily become the go-to reference for policymakers concerned with the global politics of rare earths. I could envision this book being adopted in courses offered in the disciplines of material science, political science, economics, political anthropology, geography, and sociology.

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Contamination In The Rare-Earth-Element Orthophosphate ...

Contamination In The Rare-Earth-Element Orthophosphate Reference Samples.pdf V olume 107, Number 6, N ov ember–December 2002 Journal of Research of the Nati onal Institute of Stan dards and T ...

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Analysis of Rare Earth Elements in Geologic Samples using ...

Apr 14, 2016· standard reference materials, only the SGR-1b has certified values for some of the REE, however published consensus values for the other standards are available for many of the rare earth elements. Additionally, values for many REE were also compared to a certified natural water standard (T221) from the USGS Water Resources Division.

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What Is the Rarest Mineral on Earth? | Reference.com

What Is the Rarest Mineral on Earth? Painite is believed to be the rarest mineral on Earth. By 2005, only 25 specimens had been found worldwide, though thousands of specimens were discovered in 2012.

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Characterization of Rare Earth Element Minerals in Coal ...

Characterization of Rare Earth Element Minerals in Coal Utilization Byproducts . Scott N. Montross1, Circe A. Verba2, Keith Collins2. 1 ORISE, Research and Innovation Center, National Energy Technology Laboratory, 1450 Queen Avenue SW, Albany, OR 97321 . 2 U.S. Department of Energy, Research Innovation Center, National Energy Technology Laboratory, 1450 Queen Avenue SW, Albany, OR 97321

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FoS Exam 2 RQ#1 Flashcards | Quizlet

Gold and other 'heavy elements" are rare on earth, and in the universe, because. a. they are produced by supernova - which is not the way most stars die ... The terms groups, clusters and superclusters refer to the arrangement of ____.. galaxies in the universe.

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Rare bullish S&P 500 move that has occurred only 16 times ...

3 hours ago· He refers to it as a “rare intermediate shift” in S&P 500 momentum that has only been seen 16 prior times in the last 70 years. Train your eyes on the black line at the bottom of the chart.

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The Rare Earth Elements - An Introduction | J.H.L. Voncken ...

This book deals with the rare earth elements (REE), which are a series of 17 transition metals: scandium, yttrium and the lanthanide series of elements (lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, ...

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Rare Earth Reference for Wavelength in the Far UV, NIST ...

The Rare Earth reference is measured against an air blank. Periodically check the spectra. The periodic use of your NIR Wavelength cell will build a log of your instrument's wavelength accuracy for use with certification and troubleshooting should the correlation change over time. Absorbance vs Wavelength Scan of NIR Wavelength reference

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rare earth - English-French Dictionary WordReference.com

rare earth - traduction anglais-français. Forums pour discuter de rare earth, voir ses formes composées, des exemples et poser vos questions. Gratuit.

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Rare earth - Wikipedia

Rare earth may refer to: . Rare-earth elements, a group of elements on the periodic table; Rare-earth mineral, a mineral substantively composed of these elements; Rare-earth magnet, a type of magnet that employs rare earth elements to increase effectiveness; Rare Earth hypothesis, the theory that complex life in the universe is exceptionally rare; as a proper noun:

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Rare Earth Element Concentrations in the Natural Water ...

The rare earth element and yttrium concentrations of the NRCC reference materials North Atlantic Surface seawater, NASS‐5; Coastal Atlantic Surface Seawater, CASS‐4; and the estuarine water, SLEW‐3 have been precisely determined by ICP‐MS after ca. 1:8 preconcentration following a triple chelation using HDEHP (phosphoric acid 2 ...

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