rare earth definitions

Astronomical Glossary

Astronomical Glossary - Terms Definitions Astronomical terms can be a little technical and difficult to understand. Below is a list of definitions and explanations to help you navigate astronomical texts and services. Albedo In astronomy, the term albedo refers to Get price

Banded Iron Formation

Rare earth element chemistry of 2.9–2.7 Ga banded iron-formations in India (Kato et al., 2002). Note the presence of distinct positive Eu anomalies and negative Ce anomalies in most samples, which suggest the formation of the BIFs by the mixing of hydrothermal fluids and an oxygenated bottom ocean water. Get price

The Middle Rare Earth Weight Debate

The Middle Rare Earth Weight Debate Rare earth metals or rare earth minerals comprise of 15 elements in the periodic table plus scandium and yttrium sharing similar chemical characteristics. Their 'rare' nomenclature has little to do with the way one might order Get price

What does metals, rare earth mean?

Definition of metals, rare earth in the Definitions dictionary. Meaning of metals, rare earth. What does metals, rare earth mean? Information and translations of metals, rare earth in the most comprehensive dictionary definitions resource on the web. Get price

Global Rare Earth Elements (REE) Market 2020

Global Rare Earth Elements (REE) Market reports provide in-depth analysis of Top Players, Geography, End users, Applications, Competitor analysis, Revenue, Price, Gross Margin, Market Share, Import-Export data, Trends and Forecast. Firstly, the Rare Earth Elements (REE) Market Report provides a basic overview of the industry including definitions, classifications, applications and chain structure. Get price

Monzonite

Monzonite is an igneous intrusive rock. It is composed of approximately equal amounts of plagioclase and alkali feldspar, with less than 5% quartz by weight.[1] It may contain minor amounts of hornblende, biotite and other minerals. If quartz constitutes greater than 5%, the rock is termed a quartz monzonite.[2] If the rock has a greater Get price

Environmental Risks of Mining

Already mines in China release 9,600 to 12,000 cubic meters of toxic gas containing flue dust concentrate, hydrofluoric acid, sulfur dioxide, and sulfuric acid for each ton of rare earth elements produced. Additionally, nearly 75 cubic meters of acidic waste water Get price

What does rare earth mean?

Definition of rare earth in the Definitions dictionary. Meaning of rare earth. What does rare earth mean? Information and translations of rare earth in the most comprehensive dictionary definitions resource on the web. Freebase (0.00 / 0 votes) Rate this definition: Get price

ELEMENT (noun) definition and synonyms

element Definitions and Synonyms noun countable UK / ˈelɪmənt / Other entries for this word +-trace element noun rare earth element noun at rare earth one element set, singleton noun at unit set Share this entry Quizzes Vocabulary quiz: flowers Get price

earth

earth: The land surface of the world. from The American Heritage Dictionary of the English Language, 5th Edition. noun The land surface of the world. noun The softer, friable part of land; soil, especially productive soil. noun The third planet from the sun, having a sidereal period of revolution about the sun of 365.26 days at a mean distance of approximately 149.6 million kilometers (92.96 Get price

Environmental Risks of Mining

Already mines in China release 9,600 to 12,000 cubic meters of toxic gas containing flue dust concentrate, hydrofluoric acid, sulfur dioxide, and sulfuric acid for each ton of rare earth elements produced. Additionally, nearly 75 cubic meters of acidic waste water Get price

Final Report: Oil and Gas Extraction Wastewater

EPA is conducting a study of the management of produced water from oil and gas extraction wells. EPA has completed a stakeholder engagement effort that sought input on how the Agency, states, tribes and stakeholders regulate and manage wastewater from the Get price

RARE, THREATENED AND ENDANGERED SPECIES OF OREGON

almost half of the species on earth could be extinct within the next 100 years. The major reasons for this are human caused changes to the environment, which continue to increase - in Oregon and throughout the world. Once lost, a species can never bethere is Get price

KJ Magnetics

Rare Earth magnets have a high resistance to demagnetization, unlike most other types of magnets. They will not lose their magnetization around other magnets or if dropped. They will however, begin to lose strength if they are heated above their maximum operating temperature, which is 176F (80C) for standard N grades. Get price

Category:Rare earth elements

2018/7/9Some definitions additionally include the actinides. rare earth element any of the fifteen lanthanides plus scandium and yttrium Upload media Subclass of chemical element Different from Rare Earth hypothesis Authority control Q190444 Library of Congress Get price

Astronomical Glossary

Astronomical Glossary - Terms Definitions Astronomical terms can be a little technical and difficult to understand. Below is a list of definitions and explanations to help you navigate astronomical texts and services. Albedo In astronomy, the term albedo refers to Get price

Definitions of rare earth

We found 22 dictionaries with English definitions that include the word rare earth: Click on the first link on a line below to go directly to a page where rare earth is defined. General (19 matching dictionaries) rare earth: Merriam-Webster [home, info] rare earth Get price

Rare Collectible Books

Explore thousands of old and rare books, including illuminated manuscripts, fine press editions, illustrated books, incunabula, limited editions and miniature books. Whether you're a budding rare book collector or a bibliophile with an evniable collection, discover an amazing selection of rare and collectible books from booksellers around the world. Get price

Glossary of Space Terms from A

Meteor storm – Rare events that occur when Earth encounters dense regions within a meteor stream. Such encounters can increase normal meteor rates by more than 1,000 meteors per minute. Meteorite – Rock from space that survives as it passes through the earth's atmosphere and falls to the ground. Get price

Heavy metals

Heavy metals are generally defined as metals with relatively high densities, atomic weights, or atomic numbers.The criteria used, and whether metalloids are included, vary depending on the author and context. In metallurgy, for example, a heavy metal may be defined on the basis of density, whereas in physics the distinguishing criterion might be atomic number, while a chemist would likely be Get price

25 Gorgeous Names That Are Extremely Rare (For Now)

This rare baby name is so stunning and has so much potential, it is bound to rise on those baby name charts. 17 Freya Freya may be just the name you are looking for to give to your sweetie pie little . Freya is a bit different and really is quite rare. . Get price

World Landforms

List of all landforms and definitions including desert, archipelago, waterfall, continent, channel, cliff and more land forms with glossary. List of Landforms on Earth Types of Landforms and Definitions Alluvial fan: land formation that occurs when sedimentary materials such as rocks, gravel, and silt, are deposited onto land as a result of decreasing or stopped water flow from a river or Get price

Examples of Renewable and Non

Rare earth minerals can be found scattered in the earth's crust. They are not renewable because the story of their origin is the same as the one of uranium. They formed in supernovas billions of years ago. Even though, we are not facing the shortage of their Get price

Rare Earth Elements Definitions, mineralogy and deposits

Definitions and characteristics The rare earth elements (REE) (sometimes referred to as the rare earth metals) are a group of 17 chemically similar metallic elements, including the 15 lanthanides, scandium and yttrium. The lanthanides are elements spanning atomic numbers 57 (lanthanum, La) to 71 (lutetium, Lu) (Table 1). The lanthanides all occur in nature, although promethium, the rarest Get price

Banded Iron Formation

Rare earth element chemistry of 2.9–2.7 Ga banded iron-formations in India (Kato et al., 2002). Note the presence of distinct positive Eu anomalies and negative Ce anomalies in most samples, which suggest the formation of the BIFs by the mixing of hydrothermal fluids and an oxygenated bottom ocean water. Get price