ETIMOLOGÍA DE LA PALABRA IRIDIUM
New Latin, from irido- + -ium; from its colourful appearance when dissolving in certain acids.
QUÉ SIGNIFICA IRIDIUM EN INGLÉS
Iridio
Iridium es el elemento químico con el símbolo Ir y el número atómico 77. Un metal de transición muy duro, frágil, blanco plateado de la familia del platino, Iridium es generalmente acreditado con ser el segundo elemento más denso basado en la densidad medida, aunque los cálculos que implican las rejillas espaciales De los elementos muestran que el iridio es más denso y es el metal más resistente a la corrosión, incluso a temperaturas de hasta 2000 ° C. Aunque sólo ciertas sales fundidas y halógenos son corrosivos para el iridio sólido, el polvo de iridio finamente dividido es mucho más reactivo y puede ser inflamable. El iridio fue descubierto en 1803 entre las impurezas insolubles en el platino natural. Smithson Tennant, el descubridor primario, llamado iridio para la diosa griega Iris, personificación del arco iris, debido a los sorprendentes y diversos colores de sus sales. El iridio es uno de los elementos más raros de la corteza terrestre, con una producción y consumo anual de sólo tres toneladas. 191Ir y 193Ir son los dos únicos isótopos naturales del iridio, así como los únicos isótopos estables; Este último es el más abundante de los dos.
definición de iridium en el diccionario inglés
La definición de iridio en el diccionario es un elemento de transición inerte de color blanco amarillento muy duro que es el metal más resistente a la corrosión conocido. Ocurre en minerales de platino y se utiliza como una aleación con platino. Símbolo: Ir; número atómico: 77; peso atómico: 192.22; valencia: 3 o 4; densidad relativa: 22.42; punto de fusión: 2447 ° C; punto de ebullición: 4428 ° C.
PALABRAS DEL INGLÉS RELACIONADAS CON «IRIDIUM»
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10 LIBROS DEL INGLÉS RELACIONADOS CON «IRIDIUM»
Descubre el uso de
iridium en la siguiente selección bibliográfica. Libros relacionados con
iridium y pequeños extractos de los mismos para contextualizar su uso en la literatura.
- Jongwook Choi, Alan S. Goldman: Ir-Catalyzed Functionalization of CH Bonds. - Mark P. Pouy and John F. Hartwig: Iridium-Catalyzed Allylic Substitution. - Daniel Carmona and Luis A. Oro: Iridium-catalyzed 1.3-dipolar cycloadditions.
2
Iridium Complexes in Organic Synthesis
In general terms, this books covers the application of iridium catalysts in organic synthesis from the more basic reactions to highlighted topics, including the use of specific ligands in the most important class of transition metal ...
Luis A. Oro, Carmen Claver,
2008
3
I. Synthesis and Reactivity of Chiral
Iridium(III) and ...
Chapter 1.
Stuart Edward Smith,
2008
4
Iridium: proceedings of the international symposium : held ...
Although a rare and expensive metal, iridium is finding new and varied applications.
Evan K. Ohriner, Richard D. Lanam, Minerals, Metals and Materials Society. Meeting,
2000
5
Homogeneous Catalysis with Compounds of Rhodium and
Iridium
I am grateful to Reidel for agreeing to publish this volume on Homogeneous Catalysis with Compounds of Rhodium and Iridium as part of their 'Catalysis by Metal Complexes' series.
6
High-temperature Oxidation-resistant Coatings: Coatings for ...
Most current American work on re-entry protection for graphite involves the use of
iridium and iridium alloys. IRIDIUM COATINGS FOR GRAPHITE The research on
iridium coatings for graphite is discussed in References 26-28. It has been ...
National Research Council (U.S.). Committee on Coatings,
1970
7
Carbon-hydrogen Activation and Catalysis with
Iridium ...
Chapter Two describes a thermally and air stable iridium(III) methoxo complex that undergoes intermolecular CH activation of benzene with co-generation of methanol and the iridium-phenyl complex.
William Joseph Tenn (III.),
2007
8
Current Organic Chemistry
Virginia Tech.,Blacksburg, VA 24061-0212, U.S.A. Abstract: In examining the
utilization of transition metals in synthetic organic chemistry, iridium is not a metal
which comes to the fore. In fact, while its family member, rhodium, sees extensive
...
9
Thermodynamic and Dynamic Investigations of Hydrated
Iridium ...
Yoshino et al.4'5 used a mixture of sufantoiridate complexes, predominately
anhydrous iridium (III) sulfate. The salt is dissolved to saturation in DI water and
left to stir for a week. The authors note a color change from pale green to deep
blue, ...
Heather Alyssa Elsen,
2007
10
Discovering Alvarez: Selected Works of Luis W. Alvarez with ...
21. The. Cretaceous-Tertiary. Iridium. Anomaly. and. the. Asteroid. Impact. Theory
. Frank. Asaro. Lu To U ThHfW C*Sc LaCeCo Rb Zn. In early October 1977, Luis
W. Alvarez and his son Walter dropped into my office at the Lawrence Berkeley ...
10 NOTICIAS EN LAS QUE SE INCLUYE EL TÉRMINO «IRIDIUM»
Conoce de qué se habla en los medios de comunicación nacionales e internacionales y cómo se emplea el término
iridium en el contexto de las siguientes noticias.
Police appeal for help in finding radioactive Iridium
A receptacle containing radioactive Iridium has been stolen in southern Poland, and police have appealed to the public to help find it. «thenews.pl, Jul 15»
Iridium NEXT Functionality Undergoes CATR Testing
IridiumLogo TYSONS CORNER, VA July 16, 2015 — Iridium Communications (Nasdaq: IRDM) has completed compact antenna test range ... «GovConWire, Jul 15»
Wall Street Analysts Have $11.333 Price Target on Iridium …
There are 3 research firms in total that have issued ratings on Iridium Communications Inc (NASDAQ:IRDM) within the past year. «Markets Daily, Jul 15»
Iridium Completes Compact Antenna Test Range Testing
It is the first time that a complete Iridium NEXT payload has been powered on -- both L-band and Ka-band -- and concurrently demonstrates ... «Space Ref, Jul 15»
Iridium Communications Inc (NASDAQ:IRDM) Analyst Rating Update
Analysts at Zacks have given a short term rating of hold on Iridium Communications Inc (NASDAQ:IRDM) with a rank of 3. The shares has ... «Money Flow Index, Jul 15»
Short Interest Update of Iridium Communications Inc (NASDAQ:IRDM)
Iridium Communications Inc (NASDAQ:IRDM) has seen a rise of 368,207 shares or 1.8% in the short interest. The remaining shorts are 26.2% ... «News Watch International, Jul 15»
Company Shares of Iridium Communications Inc Drops by -4.69%
Iridium Communications Inc (NASDAQ:IRDM) has lost 4.69% during the past week and dropped 18.01% in the last 4 weeks. The shares are ... «OTC Outlook, Jul 15»
Ratings Watch - Iridium Communications Inc (NASDAQ:IRDM)
Shares of Iridium Communications Inc (NASDAQ:IRDM) have been given a consensus rating of 1.8 by brokerage analysts covering the stock. «Investor Newswire, Jul 15»
Iridium Announces Release Date for Second-Quarter 2015 Financial …
MCLEAN, Va., July 9, 2015 (GLOBE NEWSWIRE) -- Iridium Communications Inc. (Nasdaq:IRDM) ("Iridium") will host a conference call on ... «Nasdaq, Jul 15»
Active Stocks in the News: Caesars Entertainment Corp (NASDAQ …
Iridium Communications Inc, declared the initial service providers for the Iridium Push-to-Talk (PTT) solution. Iridium PTT is the world's first ... «wsnewspublishers, Jul 15»