WorldCat Identities

Farges, François (1962- ...).

Overview
Works: 26 works in 38 publications in 3 languages and 208 library holdings
Genres: Portraits  History  Exhibition catalogs 
Roles: Author, Thesis advisor, Opponent
Publication Timeline
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Most widely held works by François Farges
À la découverte des minéraux et des pierres précieuses by François Farges( Book )

4 editions published between 2013 and 2018 in French and held by 74 WorldCat member libraries worldwide

La boîte à portrait de Louis XIV by Michèle Bimbenet-Privat( Book )

4 editions published in 2015 in French and held by 43 WorldCat member libraries worldwide

Trésors de la Terre : galerie de minéralogie : [exposition, Paris, Muséum national d'histoire naturelle, 2014 by Muséum national d'histoire naturelle (Paris)( Book )

2 editions published in 2014 in French and held by 25 WorldCat member libraries worldwide

Le diamant bleu by François Farges( Book )

3 editions published between 2010 and 2011 in French and held by 14 WorldCat member libraries worldwide

La saga du diamant bleu qui a suscité toutes les convoitises pendant trois siècles. Acheté par Louis XIV, le diamant est volé en 1792, pour réapparaître vingt ans plus tard à Londres. Dans cette épopée, le joailler Pierre Cartier et la milliardaire Evalyn Walsh vont se passionner pour cette pierre, mais aussi Jacky Kennedy et André Malraux
Adsorption Mechanisms of Trivalent Gold onto Iron Oxy-Hydroxides : From the Molecular Scale to the Model( )

1 edition published in 2006 in English and held by 5 WorldCat member libraries worldwide

Gold is a highly valuable metal that can concentrate in iron-rich exogenetic horizons such as laterites. An improved knowledge of the retention mechanisms of gold onto highly reactive soil components such as iron oxyhydroxides is therefore needed to better understand and predict the geochemical behavior of this element. In this study, we use EXAFS information and titration experiments to provide a realistic thermochemical description of the sorption of trivalent gold onto iron oxy-hydroxides. Analysis of Au L{sub III}-edge XAFS spectra shows that aqueous Au(III) adsorbs from chloride solutions onto goethite surfaces as inner-sphere square-planar complexes (Au(III)(OH, Cl){sub 4}), with dominantly OH ligands at pH> 6 and mixed OH/Cl ligands at lower pH values. In combination with these spectroscopic results, Reverse Monte Carlo simulations were used to constraint the possible sorption sites on the surface of goethite. Based on this structural information, we calculated sorption isotherms of Au(III) on Fe oxy-hydroxides surfaces, using the CD-MUSIC (Charge Distribution--Multi Site Complexation) model. The various Au(III)-sorbed species were identified as a function of pH, and the results of these EXAFS+CD-MUSIC models are compared with titration experiments. The overall good agreement between the predicted and measured structural models shows the potential of this combined approach to better model sorption processes of transition elements onto highly reactive solid surfaces such as goethite and ferrihydrite
Adsorption and Precipitation of Aqueous Zn(II) on Hematite Nano- and Microparticles( )

1 edition published in 2006 in English and held by 5 WorldCat member libraries worldwide

As part of a study of the effect of particle size on reactivity of hematite to aqueous metal ions, the sorption of Zn(II) on hematite nanoparticles and microparticles was examined over a wide range of Zn(II) concentrations using Zn K-edge EXAFS. When reacted with nanoparticles at pH 5.5 and low Zn(II) sorption densities (0.04 {le} {Lambda} <2.76 imol/m{sup 2}), Zn(II) formed five-coordinated or a mixture of four- and six-coordinated surface complexes with an average Zn-O distance of 2.04({+-}0.02){angstrom}. At pH 5.5 and high Zn(II) sorption densities (2.76 {ge} {Lambda} {le} 3.70 mol/m{sup 2}), formation of surface precipitates is suggested based on the presence of second-shell Zn and multiple scattering features in the Fourier transform (FT) of the EXAFS spectra. EXAFS fitting of these high {Lambda} samples yielded an average first-shell Zn-O distance of 2.10({+-}0.02){angstrom}, with second-shell Zn-Fe and Zn-Zn distances of 3.23({+-}0.03){angstrom} and 3.31({+-}0.03){angstrom}, respectively. Qualitative comparison between the EXAFS spectra of these sorption samples and that of amorphous zinc hydroxide and Zn-bearing hydrotalcite indicates the development of surface precipitates with increasing {Lambda}. EXAFS spectra of Zn(II) sorbed on hematite microparticles under similar experimental conditions showed no evidence for surface precipitates even at the highest Zn surface coverage ({Lambda} = 4 {micro}mol/m{sup 2}). These results indicate that reactivities of hematite nanoparticles and macroparticles differ with respect to Zn(II)aq, depending on Zn(II) sorption density. We suggest that the degree of hematite crystallinity affects the reactivity of hematite surfaces toward Zn(II)aq and the formation of the Zn(II) surface complexes
Selenium Speciation in Biofilms from Granular Sludge Bed Reactors Used for Wastewater Treatment( )

1 edition published in 2006 in English and held by 5 WorldCat member libraries worldwide

Se K-edge XAFS spectra were collected for various model compounds of Se as well as for 3 biofilm samples from bioreactors used for Se-contaminated wastewater treatment. In the biofilm samples, Se is dominantly as Se(0) despite Se K-edge XANES spectroscopy cannot easily distinguish between elemental Se and Se( -I)-bearing selenides. EXAFS spectra indicate that Se is located within aperiodic domains, markedly different to these known in monoclinic red selenium. However, Se can well occur within nanodivided domains related to monoclinic red Se, as this form was optically observed at the rim of some sludges. Aqueous selenate is then efficiently bioreduced, under sulfate reducing and methanogenic conditions
On the Coordination of Actinides and Fission Products in Silicate Glasses( )

1 edition published in 2006 in English and held by 5 WorldCat member libraries worldwide

The local structure around Th, U, Ce and Nd in leached silicate glasses was examined using XAFS spectroscopy at their L3 edges and also at the K edge of Fe, Co, Ni, Zr and Mo. Pellets of inactive borosilicate glasses with a simplified or a complex composition were leached statically at 90 C, at pH buffered to 0 or 6 for 28 days (surface/volume, S/V, ratios of 0.1 cm{sup -1}). These glasses are compared to another SON68 sample (denoted ''SP1'' in this paper) that was statically leached for 12 years under similar conditions, except for a higher S/V of 12 cm{sup -1} and a higher unconstrained pH of 9.6. The speciation of Fe, Co, Ni, Zr and Mo in the simple and the complex unleached are similar. In the statically leached glasses, the speciation of these transition metals is mostly identical to in the unleached glasses, except in the gels formed at the surface of the glasses leached at low pH, where large speciation differences are observed. Surface precipitates, especially for Fe (as ferrihydrite), Mo (possibly sidwillite) and Th (as ThO{sub 2}) were detected. Finally, the drying of the gels considerably affects the metal speciation by enhancing metal polymerization
Chrysolcolla Redefined as Spertiniite( )

1 edition published in 2006 in English and held by 5 WorldCat member libraries worldwide

XAFS and {mu}-XAFS spectra were collected at the Cu K-edge for seven chrysocolla samples (Peru, USA, and Congo). The results suggest that the local structure around Cu is similar to that in Cu(OH){sub 2} (spertiniite). Cu-L{sub 3} STXM imaging and spectroscopy confirm that the chrysocolla samples examined here consist of mesoscopic Cu(II)-rich domains surrounded by Si-rich domains (in agreement with results from infra-red spectroscopy). Hence, we suggest that chrysocolla, which is generally considered to be orthorhombic with composition (Cu, Al){sub 2}H{sub 2}Si{sub 2}O{sub 5}(OH){sub 4} {center_dot} nH{sub 2}O, is in actually a mesoscopic assemblage composed dominantly of spertiniite (Cu(OH){sub 2}), water and amorphous silica (SiO{sub 2})
Organisation locale autour de Zr, Th et U dans des silicates amorphes minéraux métamictes et verres silicates by François Farges( Book )

1 edition published in 1989 in French and held by 3 WorldCat member libraries worldwide

LES ELEMENTS INCOMPATIBLES DES LIQUIDES MAGMATIQUES SONT PRESENTS DANS DES COMPLEXES ETUDIES ICI DANS DEUX SYSTEMES AMORPHES: MINERAUX ACCESSOIRES METAMICTES ET VERRES SILICATES. ZR, TH ET U (IV) ONT DES SITES A COORDINENCE 6 QUI SONT INCONNUS OU RARES DANS LES MINERAUX CRISTALLISES. LEUR STABILISATION DANS LA PHASE VITREUSE EST EN BON ACCORD AVEC LE COMPORTEMENT GEOCHIMIQUE DE CES ELEMENTS DANS LES SERIES DIFFERENCIEES ALCALINES ET/OU RICHES EN FLUOR
La lecture des pierres by Roger Caillois( Book )

2 editions published in 2014 in French and held by 3 WorldCat member libraries worldwide

La "redécouverte" du grand saphir de 291 carats dit "Devonshire-Branicki" premières synthèses by François Farges( )

2 editions published in 2013 in French and held by 2 WorldCat member libraries worldwide

Tan suo fa xian by François Farges( Book )

1 edition published in 2016 in Chinese and held by 2 WorldCat member libraries worldwide

Ben shu jiang dai nin fa jue yan chuang zhong kuang wu he bao shi, Gan shou da zi ran zhi mei. Shu zhong xiang xi jie shao le kuang shi de ji chu zhi shi, Bao shi, Kuang shi de jian bie, Ti gong le 107 zhong kuang wu, Yan shi, Bao shi de zi liao, Gong nin le jie he bian bie
Caractérisation des oxydes de manganèse et usage des pigments noirs au Paléolithique supérieur by Emilie Chalmin( Book )

1 edition published in 2003 in French and held by 2 WorldCat member libraries worldwide

La plupart des peintures pariétales du Paléolithique supérieur sont rouges (hématite naturelle pure ou en mélange avec des argiles) ou noirs (charbon ou oxyde de manganèse). Ces pigments ont été préparés par broyage, mélange et peut-être chauffage. Les analyses physico-chimiques permettent de déterminer la nature du matériau, son mode de préparation et éventuellement sa provenance. Les diverses phases d'oxyde de manganèse se distinguent par leur composition chimique, leur structure et l'état de valence de l'ion Mn (II, III, IV). La transformation structurale des oxydes lors d'un traitement thermique a été suivie par MET. Ce travail nous a conduit à déterminer des stigmates caractéristiques d'un chauffage, comme des pores dans la bixbyite (Mn2O3). L'analyse d'échantillons archéologiques provenant de France et d'Espagne a permis d'évaluer le niveau technique des Préhistoriques. La matière picturale est constituée de pigment brut ou mélangé. Cependant aucun pigment noir chauffé n'a été identifié dans les prélèvements analysés
Le diamant bleu by François Farges( )

2 editions published in 2011 in French and held by 2 WorldCat member libraries worldwide

Au sujet du vrai visage de Vivaldi : essai iconographique by François Farges( )

1 edition published in 1992 in French and held by 2 WorldCat member libraries worldwide

Kuang wu yu bao shi = Mineral & gemstones by François Farges( Book )

1 edition published in 2015 in Chinese and held by 2 WorldCat member libraries worldwide

Comportement d'éléments formateurs et modificateurs de réseau dans des magmas hydratés by Manuel Muñoz( Book )

1 edition published in 2003 in French and held by 1 WorldCat member library worldwide

This study consists of a better understanding of physical and chemical properties of hydrated magmatic systems associated to subduction zones. We are particularly interested in determining the behavior of network modifiers "trace" elements (Ni and Zr), as well as network formers major elements (Ga and Ge) in this kind of geomaterials. The study is essentially based on an experimental approach, using high-pressure systems (diamond-anvil cell, Paris-Edingurgh press) coupled to X-ray Absorption Fine Structure (XAFS) spectroscopy. For the different chemical systems studied, the results collected under high temperature and/or high pressure show well different behavior for nickel and zirconium as a function of water content. The local structural environment of nickel is highly affected by the presence of water, suggesting a significant interaction between nickel and the aqueous phase. In contrast, the local structure around zirconium is practically unchanged. Moreover, for major analog elements (Ga and Ge), no significant structural modification is observed as a function of temperature, pressure or water content; suggesting possibly that water does not depolymerize the silicate network. Additional experiments shown the usefulness of XANES (X-ray Absorption Near Edge Structure) spectra for determining, in situ, nickel contents as well as densities of hydrous silicate magmas. Results show a "water/silicate" partitioning coefficient near 0.2; suggesting a low but significant mobilization of nickel by the aqueous phase during the magmatic ascension. Also at around 780 °C / 520 MPa, the apparent-density of hydrated magmas near 1 g/cm3, suggests a structural aspect of "emulsion" type including particularly high water content, as well as a very important dynamic of magmatic ascension in its homogeneous flow regime
Influence des dégâts d'irradiation sur les minéraux analogues by Messaoud Harfouche( Book )

1 edition published in 2003 in French and held by 1 WorldCat member library worldwide

L'étude qui est faite ici aborde le problème du stockage des déchets radioactifs à haute activité. Une attention particulière est portée aux matrices de confinement. Les premiers déchets radioactifs ont été incorporés dans le verre de la nephiline de Chalk River, Canada. Les déchets sont incorporés dans des verres durables, et pour lesquels la vitrification à une échelle industrielle est faisable. En France (comme pour la plupart des nations), les verres borosilicatés sont à nos jours les compositions de choix pour le stockage des déchets radioactifs à haute activité. Les minéraux naturels ayant reçu de très petites doses de radiation durant des centaines de millions d'années ont l'avantage de représenter les effets de radiations à long terme. Ces minéraux, analogues aux céramiques irradiées offrent la possibilité d'étudier l'effet réel " in-situ " des dégâts d'irradiation en particulier l'évolution de la structure des céramiques recevant de fortes doses d'irradiation. Les minéraux analogues tels que zircon, monazite, zirconolite et titanite, dans cette étude, subissent des dégâts d'irradiation. Ces dégâts sont dus à la présence d'actinides naturels (U et Th) dans les minéraux pendant une longue période (~10 [puissance 9] ans). Le phénomène de l'irradiation est bien connu, mais ce que l'on ignore est l'effet de cette radiation sur la structure cristalline des minéraux. Les minéraux métamictes sont des minéraux ayant accumulés de fortes doses de radiation dues aux désintégrations [alpha] (en majeure partie) [beta] et issus des actinides naturels U et Th dans la structure. Ces minéraux cristallins à l'origine se trouvent, généralement, dans une large gamme allant de l'état cristallin à complètement métamicte (amorphe ou apériodique). Il est évident que la compréhension des effets d'irradiation et les mécanismes d'endommagements, à travers les minéraux naturels et les phases synthétiques correspondantes, peut aider à évaluer et à modéliser le comportement à long terme (jusqu'à 10 [puissance 6] ans) des matériaux de stockage des déchets nucléaires. Des échantillons de différentes localités à travers le monde ont été sélectionnés et caractérisés par microsonde électronique et DRX. La spectroscopie des rayons X (XAFS) sur ces échantillons, appuyée par la simulation théorique (dynamique moléculaire) des dégâts d'irradiation dans le zircon, ont permis d'étudier l'environnement structural dans les céramiques à travers les minéraux analogues. Nous avons pu montrer que l'effet immédiat de l'incorporation des actinides par substitution engendre soit une expansion de la structure locale autour de ces actinides (zircon) soit une contraction (zirconolite et titanite) soit la structure reste pratiquement inchangée comme dans le cas de monazite. Après avoir subi des dommages d'irradiation la structure des minéraux devient plus complexe. On note des distorsions dans la structure avec changement de coordinence de certains éléments (exemple [8]Zr ₂![7]Zr) ainsi que la polymérisation des tétraèdres de Si dans le zircon et P dans la monazite
Approche physico-chimique et structurale des effets de l'irradiation sur la durabilité des verres by Amine Haddi( Book )

1 edition published in 2007 in French and held by 1 WorldCat member library worldwide

Des verres alumino-borosilicatés alcalins ont été soumis à des tests d'altération aqueuse après avoir été ou non pré-irradiés par des ions lourds de basse énergie. Nous avons mis en oeuvre un ensemble de techniques de caractérisation physico-chimique et structurale afin de décrire l'évolution de la morphologie et de la composition superficielle de verres simples dopés avec un ou plusieurs éléments de transition (Fe, Mo, Nd, Cs, Ce, Th) ainsi que la cinétique de relâchement des éléments dans la solution. Dans quelques cas (verres simples, couches d'altération et verres complexes), nous avons également cherché à préciser l'éventuelle évolution de l'environnement chimique des dopants au moyen de l'absorption X. Il apparaît clairement que la vitesse de dissolution d'un borosilicate alcalin pré-irradié augmente d'un facteur 2 à 4 par rapport à celle de son homologue non irradié et lixivié dans les mêmes conditions. L'irradiation affecte surtout les distributions superficielles du bore et du sodium. Elle conduit à la formation de couches hydratées plus morcelées. En outre, elle favorise l'enrichissement superficiel en éléments réputés difficilement solubles comme A1 et Fe dans la mesure où l'hydratation de la surface du verre est accentuée. Enfin, l'irradiation semble avoir pour effet de retenir des éléments mobiles comme le molybdène dans la couche altérée et notamment quand il se trouve associé au fer
 
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Audience level: 0.89 (from 0.81 for Adsorption ... to 0.97 for Tan suo fa ...)

Alternative Names
Франсуа Фарж

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