Compos Du Germanium
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Home > Art, Film & Photography > Compos Du Germanium: Germane, Germanate de Bismuth, Silicium-Germanium, Germanite
Compos Du Germanium: Germane, Germanate de Bismuth, Silicium-Germanium, Germanite

Compos Du Germanium: Germane, Germanate de Bismuth, Silicium-Germanium, Germanite


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About the Book

Les achats comprennent une adhsion l'essai gratuite au club de livres de l'diteur, dans lequel vous pouvez choisir parmi plus d'un million d'ouvrages, sans frais. Le livre consiste d'articles Wikipedia sur: Germane, Germanate de Bismuth, Silicium-Germanium, Germanite. Non illustr. Mises jour gratuites en ligne. Extrait: Le germane, ou ttrahydrure de germanium, est le compos chimique de formule GeH4. C'est l'hydrure le plus simple du germanium, et l'analogue pour le germanium du silane SiH4 pour le silicium ou du mthane CH4 pour le carbone. La molcule GeH4 a une gomtrie ttrahdrique, comme les molcules SiH4 et CH4. Le germane est la forme industriellement la plus utile du germanium, de sorte que de nombreuses mthodes de prparation industrielle ont t labores pour en produire. On peut les ranger en trois catgories: La rduction chimique consiste faire ragir des composs contenant du germanium (par exemple du germanium lmentaire, du ttrachlorure de germanium GeCl4 ou du dioxyde de germanium) GeO2 avec un agent rducteur tel que NaBH4, KBH4, LiBH4, NaAlH4, LiH, NaH ou MgH2. La raction peut avoir lieu aussi bien dans un solvant organique qu'en solution aqueuse. En laboratoire, le germane peut s'obtenir en faisant ragir des composs au Ge(IV) avec des hydrures, par exemple: Na2GeO3 + NaBH4 + H2O GeH4 + 2 NaOH + NaBO2La rduction lectrochimique consiste appliquer une tension entre d'une part une cathode de germanium mtallique immerge dans un lectrolyte aqueux et d'autre part une anode en molybdne ou en cadmium. Dans ce dispositif, le germane et l'hydrogne se forment l'anode tandis que l'anode se couvre d'oxyde de molybdne ou de cadmium selon le cas. La synthse au plasma consiste bombarder du germanium mtallique avec des atomes d'hydrogne produits partir d'une source plasma haute frquence afin de produire du germane et du digermane. Dans l'ammoniac liquide, GeH4 s'ionise avec NH3 ...http: //booksllc.net/?l=fr


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Product Details
  • ISBN-13: 9781159423889
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • No of Pages: 20
  • Spine Width: 1 mm
  • Weight: 45 gr
  • ISBN-10: 1159423881
  • Publisher Date: 27 Jul 2010
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Germane, Germanate de Bismuth, Silicium-Germanium, Germanite
  • Width: 229 mm


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