| Wikipedia__Yttrium Properties of the element, including its history, applications, and characteristics. |
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| Wikipedia__Technetium Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Technetium Full text of the monograph by Edward Anders (Enrico Fermi Institute and Dept. of Chemistry, University of Chicago, Chicago, Illinois). [PDF format] (November, 1960) |
| ChemicalElements_com__Rhenium Basic information, atomic structure, and isotopes. |
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| LANL__Rhenium History, sources, properties, and uses. |
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| USGS_Minerals_Information__Rhenium Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
| Visual_Elements__Rhenium General and physical information, source, uses, key isotopes, and ionisation energies. |
| WebElements__Rhenium Extensive information on history, uses, occurrence, compounds, and properties. |
| Wikipedia__Rhenium Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Rhenium Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (March, 1961) |
| ChemicalElements_com__Mercury Basic information, atomic structure, and isotopes. |
| EnvironmentalChemistry_com__Mercury___Nuclides Extensive information on the nuclides of mercury, including potential parent nuclides. |
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| Mercury,_Get_Mad_Now,_Not_Later Gives a description of mercury, as well as its uses and environmental and health hazards associated with it. |
| Mercury_in_Space Answers the question of what happens to Mercury in space. |
| Mercury_in_the_Laboratory Practical considerations when working with mercury in the laboratory. |
| Sandia_National_Laboratories___Mercury Information about mass of isotopes of mercury. Also information on analyzing it, such as Heavy Ion BackScattering and Rutherford BackScattering. |
| USGS_Minerals_Information__Mercury Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
| Vermont_Legislative_Research_Shop_-_Mercury_Information Features basic information about Mercury, as well as its harmful effects and legislation concerning Mercury in some American States. |
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| WebElements__Mercury Contains extensive information about Mercury, as well as pictures and videos that show its physical appearance and how it reacts with certain chemicals. |
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t´r
m) (KEY) [for Ytterby, a town in Sweden], metallic chemical element; symbol Y; at. no. 39; at. wt. 88.9059; m.p. about 1,522°C; b.p. 3,338°C; sp. gr. about 4.45; valence +3. Yttrium is a highly crystalline iron-gray metal. Usually considered a rare-earth metal, it is found above lanthanum in Group 3 of the periodic table. Yttrium is fairly stable in air but oxidizes readily when heated. It reacts with water and mineral acids. The largest use of the element is as its oxide yttria, Y2O3, which is used in making red phosphors for color television picture tubes; it also has other uses. Yttrium metal has found some use alloyed in small amounts with other metals. Yttrium is not found uncombined in nature, but occurs in many minerals, e.g., gadolinite, euxenite, and xenotime. It is recovered commercially from monazite and bastnasite. In 1794, Johan Gadolin isolated impure yttria from the mineral gadolinite. In 1843, C. G. Mosander isolated pure yttria as well as two impure fractions that he called erbia and terbia. The metal was first isolated in 1828 by Friedrich Wöhler. The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press.CONTENTS · INDEX · GUIDE · BIBLIOGRAPHIC RECORD
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