4–1 to 4–33 in Reference Data For Engineers: Radio, Electronics, Computer, and Communications. Despite the lack of strontium deficit referenced in the medical literature and the lack of information about possible toxicity of strontium supplementation, such compounds can still be sold in the United States under the Dietary Supplements Health and Education Act of 1994. 186–197. Atomic and Electronic Structure of Solids. ", "Strontium isotopes reveal distant sources of architectural timber in Chaco Canyon, New Mexico", "Identifying the contribution of wild and hatchery Chinook salmon (Oncorhynchus tshawytscha) to the ocean fishery using otolith microstructure as natural tags", 10.1666/0094-8373(2003)029<0197:MTOOFA>2.0.CO;2, "Chemistry of Firework Colors – How Fireworks Are Colored", "With better atomic clocks, scientists prepare to redefine the second", "What are the fuels for radioisotope thermoelectric generators? They have been reported as intermediates in Barbier-type reactions. Cambridge: RSC Publishing, 2005. The second stage produces a dark-coloured material containing mostly strontium sulfide. [20][21] While 90Sr (half-life 28.90 years) has been used similarly, it is also an isotope of concern in fallout from nuclear weapons and nuclear accidents due to its production as a fission product. Clementi-Raimondi Effective Nuclear Charge, Batsanov Crystallographic Van Der Waals Radius, Batsanov Equilibrium Van Der Waals Radius. 9003–9014. The largest commercially exploited deposits are found in England. Aarkrog, A. The strontium is processed like calcium by the body, preferentially incorporating it into bone at sites of increased osteogenesis. 191–222 in Sediments, Diagenesis, and Sedimentary Rocks. National Institute for Occupational Safety and Health (NIOSH). Bone Joint J, 99(SUPP 18), 2-2. International New York: HarperCollins College Publishers, 1993. Edited by Richard W. Carlson. Pearson, Ralph G. "Absolute Electronegativity and Hardness: Application to Inorganic Chemistry." Structure and Bonding in Crystalline Materials. [53], The metal is produced commercially by reducing strontium oxide with aluminium. Origin of Elements in the Solar System: Implications of Post-1957 Observations. 751–767. http://www.cdc.gov/niosh-rtecs/wk757e20.html. Enhances osteogenic differentiation of mesenchymal stem cells. Chez l'homme, même à faible dose, le chromate de strontium (en) provoque des cancers du poumon[11] quand il est inhalé. Computational Chemistry of Solid State Materials. "Molecular Double-Bond Covalent Radii for Elements Li-E112." This so-called "black ash" is dissolved in water and filtered. [59], 87Sr/86Sr ratios are commonly used to determine the likely provenance areas of sediment in natural systems, especially in marine and fluvial environments. Bowen, H. J. M. Environmental Chemistry of the Elements. Strontium was among the radioactive materials released by the 1957 Windscale fire. CRC Handbook of Chemistry and Physics, 88th edition. Electron Binding Energies. La dernière modification de cette page a été faite le 27 avril 2020 à 19:06. He also came to the conclusion that it was distinct from the witherite and contained a new earth (neue Grunderde). Edited by Richard W. Carlson. doi:10.1016/S0092-640X(03)00059-7. doi:10.1021/ed067p911. Marshall, James L. Discovery of the Elements: A Search for the Fundamental Principles of the Universe, 2nd edition. An atom of an element is most stable when its outer electron shell is completely filled or half-filled. Nature." the Elements, 7th edition. Batsanov, S. S. "Van der Waals Radii of Elements." 2005. It is therefore considered to be a fire hazard. [33][34][35][36][37], The first large-scale application of strontium was in the production of sugar from sugar beet. Journal of the American Krause, M. O. Journal of Chemical Edited by I. La masse atomique standard du strontium est de 87,62(1) u. Fact Check: What Power Does the President Really Have Over State Governors? Yaws, Carl L. "Liquid Density of the Elements." Is the Coronavirus Crisis Increasing America's Drug Overdoses? Paleobiology, 29: 197 - 204. "Molecular Single-Bond Covalent Radii for Elements 1-118." [23], Strontium is named after the Scottish village of Strontian (Gaelic Sròn an t-Sìthein), where it was discovered in the ores of the lead mines. King, H. W. "Pressure-Dependent Allotropic Structures of the Elements." [78], The human body absorbs strontium as if it were its lighter congener calcium. Strontium is the chemical element with the symbol Sr and atomic number 38. Strontium (pronounced /ˈstrɒntiəm/) is a chemical element with the symbol Sr and the atomic number 38. Palme, H., and Hugh St. C. O'Neill. "Coal Formation and Geochemistry." [6] It is softer than calcium and harder than barium. Bulletin of Alloy Phase Diagrams, volume 4, number 4, 1983, pp. Journal of The ultra-narrow optical transition between the [Kr]5s2 1S0 electronic ground state and the metastable [Kr]5s5p 3P0 excited state of 87Sr is one of the leading candidates for the future re-definition of the second in terms of an optical transition as opposed to the current definition derived from a microwave transition between different hyperfine ground states of 133Cs. , 99 ( SUPP 18 ), 2-2. International New York: HarperCollins College,! And Hugh St. C. O'Neill oxide with aluminium Diagrams, volume 4, number 4, 1983, pp dernière! Crc Handbook of Chemistry and Physics, 88th edition Safety and Health NIOSH. This so-called `` black ash '' is dissolved in water and filtered Universe, 2nd edition Elements in the System. Material containing mostly strontium sulfide it was distinct strontium charge the witherite and contained a earth! 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