Výsledky vyhledávání - "Ralf Siewert"

STRUCTURAL ENVIRONMENTS AROUND MOLYBDENUM IN SILICATE GLASSES AND MELTS. I. INFLUENCE OF COMPOSITION AND OXYGEN FUGACITY ON THE LOCAL STRUCTURE OF MOLYBDENUM

Autor: Anne Guesdon, François Farges, Ralf Siewert, Guillaume Morin, Gordon E. Brown

Publikováno v: The Canadian Mineralogist
The Canadian Mineralogist, 2006, 44, pp.731-753
The Canadian Mineralogist, Mineralogical Association of Canada, 2006, 44, pp.731-753

The coordination chemistry of molybdenum was investigated in nine series of synthetic silicate glasses, including sodium disilicate (NS2), sodium trisilicate (NS3), albite (Ab), anorthite (An), Ab50An50, Ab30An70, diopside (DI), rhyolite (RH), and ba

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dd7e3b629c20d12d812c3f4ca7bcde9
https://doi.org/10.2113/gscanmin.44.3.731

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Transition elements in water-bearing silicate glasses/melts. part II. Ni in water-bearing glasses

Autor: Ralf Siewert, Manuel Muñoz, F. Farges, Gordon E. Brown, Harald Behrens, Marcus Nowak, Pierre-Emmanuel Petit, Valã©Rie Malavergne

Publikováno v: Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta, Elsevier, 2001, 65 (10), pp.1679--1693. ⟨10.1016/S0016-7037(00)00624-4⟩

International audience; The local coordination environment around Ni(II) in a series of sodium trisilicate (NS3) and albitic (ALB) glasses has been evaluated by using high-resolution XANES and anharmonic EXAFS spectroscopies. The glasses contain simi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56a424bec90c51c49f275c752423425e
https://doi.org/10.1016/s0016-7037(00)00624-4

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Viscoelastic relaxation measurements in the system SiO2-NaAlSiO4by photon correlation spectroscopy

Autor: Matthias Rosenhauer, Ralf Siewert

Publikováno v: American Mineralogist. 82:1063-1072

Relaxation times of longitudinal strain for five supercooled liquids along the join SiO2 (qz)-NaAlSiO4 (ne) including the compositions of albite (ab), ab 50jd50, jadeite (jd), jd 66ne33, and jd33ne66 were measured by photon correlation spectroscopy w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ff5cf4efde5a90609dfa21cebe01aac
https://doi.org/10.2138/am-1997-11-1203

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Structural environements around molybdenum in silicate glasses and melts. II. Effects of temperature, pressure, H2O, halogens and sulfur

Autor: Ralf Siewert, François Farges, Michel Pichavant, Harald Behrens, Carl W. Ponader, Gordon E. Brown

Publikováno v: The Canadian Mineralogist
The Canadian Mineralogist, Mineralogical Association of Canada, 2006, 44 (3), pp.755-773. ⟨10.2113/gscanmin.44.3.755⟩
The Canadian Mineralogist, 2006, 44 (3), pp.755-773. ⟨10.2113/gscanmin.44.3.755⟩

International audience; The local structure around molybdenum (at a concentration of 2000 ppm) in densified silicate glasses (to 7 kbar), melts (to 1210 K), and fluid-bearing (either H2O, halogens, or sulfur) glasses was investigated by the means of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e36f7fc57c4c655afbaf198f82fd9698
https://hal-insu.archives-ouvertes.fr/hal-00081785

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