Jérôme Dugué - Academia.edu (original) (raw)
Papers by Jérôme Dugué
Dugué Jérôme. Un catalogue de cinquante majoliques italiennes. In: Revue d'histoire de la pha... more Dugué Jérôme. Un catalogue de cinquante majoliques italiennes. In: Revue d'histoire de la pharmacie, 98e année, N. 370, 2011. p. 272
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 1978
Lanthanum disulphide, LaS2: is orthorhombic, space group Pnma, with unit-cell constants a = 8.131... more Lanthanum disulphide, LaS2: is orthorhombic, space group Pnma, with unit-cell constants a = 8.131 (5), b = 16.34 (1), c = 4.142 (2) A and Z = 8. The crystal structure has been determined from Syntex automatic diffractometer data, using Patterson and Fourier syntheses, and refined by the least-squares method to a final R of 0.045. Sheets of (LaS), parallel to the [ 100] axis, are formed from LasS pyramids; between these layers, planes of S atoms are inserted, formed from S-S pairs in which the interatomic distance (2.104 A) indicates a covalent bond. The structure is related to a distorted arrangement of anti-Fe2As type.
Chemischer Informationsdienst, 1972
Thermochimica Acta, 1992
ABSTRACT
Thermochimica Acta, 1991
ABSTRACT
Acta Crystallographica Section C Crystal Structure Communications, 1986
Ga 9 Tl 3 O 2 S 13 cristallise dans P6 avec a=9,598 et c=7,433 A, Z=1. Affinement jusqu'a R=0... more Ga 9 Tl 3 O 2 S 13 cristallise dans P6 avec a=9,598 et c=7,433 A, Z=1. Affinement jusqu'a R=0,050
Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry, 1998
The phase diagram of the Ag2Te-In2Te3 quasibinary system was established by differential thermal ... more The phase diagram of the Ag2Te-In2Te3 quasibinary system was established by differential thermal analysis and X-ray diffraction, in particular by the Guinier — Lenné method. This study confirms the existence of three intermediate ternary phases: AgInTe2, which crystallizes in a chalcopyrite-type structure and possesses a homogeneity range, undergoes a peritectic decomposition at 650 °C; AgIn5Te8, which possesses a large homogeneity
The Rare Earths in Modern Science and Technology, 1980
The rare earth dichalcogenide structures are derived from a common type, the tetragonal anti Fe2A... more The rare earth dichalcogenide structures are derived from a common type, the tetragonal anti Fe2As-type (P4/n mm). All of these structures have layers of (LaX) n n+ (X = S, S3) that alternate with chalcogen layers (S or Se)n. They are assembled with a pseudo-tetragonal symmetry. In the layers of S or Se, the atoms form covalent pairs.
Thermochimica Acta, 2003
... Jones and Owen [11] studied the same system using an XRD method. They completed an earlier wo... more ... Jones and Owen [11] studied the same system using an XRD method. They completed an earlier work presented by Owen and O'Donnell Roberts [12]. ... In at 575 °C. In the range of 710–470 °C their values agree very well with the results of Owen and O'Donnell Roberts. ...
Journal of Solid State Chemistry, 1992
Trimorphism is presented in the form of a topological description as the capability of a chemical... more Trimorphism is presented in the form of a topological description as the capability of a chemical substance to exist under five aggregation states: three crystalline solid forms, the liquid, and the vapor. The general rules to construct the corresponding (p, T) diagram and to locate the 10 triple points are given and discussed. Several theoretical diagrams are presented in the case in which one deals with only three stable triple points. An example of application is given for the dimethyl 3,6-dichloro-2,5dihydroxyterephthalate. Hierarchies of stability among the three forms are inferred qualitatively as a function of increasing pressure and, quantitatively, also in domains of temperatures lower than those investigated by other authors in a previous experimental work. These stability hierarchies show a great sensitivity to the choice of an enthalpy change value, with respect to another of the same quantity, in determining the slopes of the two-phase equilibrium curves.
Journal of Solid State Chemistry, 1984
Abstract The preparation and structural features of compounds of the general formula (R O) n (M x... more Abstract The preparation and structural features of compounds of the general formula (R O) n (M x X y ) , with R =rare earth, M =IB, IIIA, IVA, or VA elements, and X =S or Se, are described. Four families of oxysulfides can be prepared by the reaction of a rare earth oxysulfide and a post-transition metal sulfide. These include (R O) 4 Ga 2 S 5 for R =Ce(tetragonal P4/mmm ) and R =Pr to Sm(orthorhombic Pbca of the type (NdO) 4 Ga 2 S 5 ); (R O) 4 Ca 1.33 S 4 for R =La and Ce(tetragonal P4/mmm ); (R O) 4 Ge 1.5 S 5 for R =La to Nd(orthorhombic Pbca type (NdO) 4 Ga 2 S 5 ); (R O) 4 Sn 2 S 6 for R =La to Nd(orthorhombic pbnm type (LaO) 4 Sn 2 S 6 ). The reaction of lanthanum oxyselenide and the metal selenide gives (LaO)GaSe 2 , (LaO)InSe 2 , (LaO) 4 Ge 1.5 Se 5 , (LaO) 4 Sn 2 Se 6 , and (LaO)SbSe 2 . Crystal data are given for these systems. Although these compounds crystallize in several different space groups, they all have sheet structures formed by alternation of an oxide sheet ( R O) and a sulfide or selenide sheet ( M x X y ). They belong to 7 new structural types. The ( R O) sheets have the same tetragonal or pseudotetragonal array of R 4 O tetrahedra, but the ( M x X y ) sheets have various structures, with 2, 3, or 4 layers of X atoms. The structural characters of these compounds are discussed.
Journal of Solid State Chemistry, 1987
The two isomorphous compounds LaCrOSâ and LaCrOSeâ are ferromagnetic (T/sub c/ = 35 and 51 K, res... more The two isomorphous compounds LaCrOSâ and LaCrOSeâ are ferromagnetic (T/sub c/ = 35 and 51 K, respectively). This implies ferromagnetic super-superexchange interactions. NdCrOSâ is antiferromagnetic (T/sub N/ = 72 K) and undergoes a spin-flop transition (H/sub c/ = 54 KOe at 20 K). The study of the thermal variation of Cr/sup 3 +/ and Nd/sup 3 +/ magnetic moments below T/sub N/ allows a rough estimate of the Cr-Nd and Cr-Cr exchange fields ratio (approx.0.1).
Journal of Solid State Chemistry, 1988
Two series of compounds are described with the light lanthanides (from La to Tb) with n = 2 and 3... more Two series of compounds are described with the light lanthanides (from La to Tb) with n = 2 and 3. They are obtained by direct union at 1400°C of R202S and UOS. The n = 2 series, of U2RZ04S3 composition, is isostructural with Ce404S3 (or Ce~"Ce~"O&). The n = 3 series, of U&O& composition, is isostructural with CesO& (or Ce~"Ce~'O&). The orthorhombic structures of these compounds result in periodic sheers in the structural array of hexagonal R202S. The crystal parameters of the two series of compounds are determined. In the case of lanthanum, compounds are formed by periodic sheers having longer periods than the preceding ones. All the terms from n = 2 to n = 6 are described and their crystal parameters are determined. 8 1988 Academic press, IK.
Journal of Solid State Chemistry, 1989
PrCrOS2 is antiferromagnetic with TN = 83 K. The magnetic space group is Bp2'... more PrCrOS2 is antiferromagnetic with TN = 83 K. The magnetic space group is Bp2'/m'. The variations of muCr and muPr with temperature were studied. The properties of PrCrOS2 are very similar to those of NdCrOS2.
Journal of Solid State Chemistry, 1995
Journal of Solid State Chemistry, 1993
ABSTRACT
Journal of Non-Crystalline Solids, 1998
The Ag 2 S±Ga 2 S 3 ±GeS 2 pseudo ternary system shows a large glass-forming region. Ternary glas... more The Ag 2 S±Ga 2 S 3 ±GeS 2 pseudo ternary system shows a large glass-forming region. Ternary glass formation does not reach the Ga 2 S 3 ±Ag 2 S binary system. Electrical properties of the glasses were investigated by measuring complex impedance. For instance, at 298 K, for the xAg 2 S±Ga 2 S 3 ±(9 A x)GeS 2 compositions (x 1±6) electrical conductivity and activation energy vary roughly between 10 À10 and 10 À5 S cm À1 , and 0.60 and 0.34 eV, respectively. Ionic transference number measurements and electronic transference number estimates indicate that these glasses are essentially ionic conductors.
Journal of Alloys and Compounds, 1993
Abstract The phase diagram of the AgSbSe system was studied by differential thermal analysis, X... more Abstract The phase diagram of the AgSbSe system was studied by differential thermal analysis, X-ray diffraction and metallography analysis. Two ternary phases were observed: the AgSbSe 2 compound, an f.c.c. NaCl-like structure with congruent melting and a new phase, to which the formula Ag 3 Sb 7 Se 12 is attributed. This last compound is dimorphic and the transition between the two forms occurs at about 200 °C. The high temperature structure disappears at about 360 °C. Four quasi-binary sections are described in this ternary system. Seven ternary invariants are characterized: five eutectics of which two are degenerated at the selenium apex, and two peritectics. In the temperature range between 360 and 558 °C, besides the seven three-phase domains, there are five two-phase domains. Three ternary liquid-liquid miscibility gaps are observed, of which only two are crossed by a valley. Finally, a glass domain with a small extension, which comes from a binary glass zone rich in selenium of the SbSe system, was established within the (AgSbSe 2 )SeSb 2 Se 3 triangle.
Dugué Jérôme. Un catalogue de cinquante majoliques italiennes. In: Revue d'histoire de la pha... more Dugué Jérôme. Un catalogue de cinquante majoliques italiennes. In: Revue d'histoire de la pharmacie, 98e année, N. 370, 2011. p. 272
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 1978
Lanthanum disulphide, LaS2: is orthorhombic, space group Pnma, with unit-cell constants a = 8.131... more Lanthanum disulphide, LaS2: is orthorhombic, space group Pnma, with unit-cell constants a = 8.131 (5), b = 16.34 (1), c = 4.142 (2) A and Z = 8. The crystal structure has been determined from Syntex automatic diffractometer data, using Patterson and Fourier syntheses, and refined by the least-squares method to a final R of 0.045. Sheets of (LaS), parallel to the [ 100] axis, are formed from LasS pyramids; between these layers, planes of S atoms are inserted, formed from S-S pairs in which the interatomic distance (2.104 A) indicates a covalent bond. The structure is related to a distorted arrangement of anti-Fe2As type.
Chemischer Informationsdienst, 1972
Thermochimica Acta, 1992
ABSTRACT
Thermochimica Acta, 1991
ABSTRACT
Acta Crystallographica Section C Crystal Structure Communications, 1986
Ga 9 Tl 3 O 2 S 13 cristallise dans P6 avec a=9,598 et c=7,433 A, Z=1. Affinement jusqu'a R=0... more Ga 9 Tl 3 O 2 S 13 cristallise dans P6 avec a=9,598 et c=7,433 A, Z=1. Affinement jusqu'a R=0,050
Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry, 1998
The phase diagram of the Ag2Te-In2Te3 quasibinary system was established by differential thermal ... more The phase diagram of the Ag2Te-In2Te3 quasibinary system was established by differential thermal analysis and X-ray diffraction, in particular by the Guinier — Lenné method. This study confirms the existence of three intermediate ternary phases: AgInTe2, which crystallizes in a chalcopyrite-type structure and possesses a homogeneity range, undergoes a peritectic decomposition at 650 °C; AgIn5Te8, which possesses a large homogeneity
The Rare Earths in Modern Science and Technology, 1980
The rare earth dichalcogenide structures are derived from a common type, the tetragonal anti Fe2A... more The rare earth dichalcogenide structures are derived from a common type, the tetragonal anti Fe2As-type (P4/n mm). All of these structures have layers of (LaX) n n+ (X = S, S3) that alternate with chalcogen layers (S or Se)n. They are assembled with a pseudo-tetragonal symmetry. In the layers of S or Se, the atoms form covalent pairs.
Thermochimica Acta, 2003
... Jones and Owen [11] studied the same system using an XRD method. They completed an earlier wo... more ... Jones and Owen [11] studied the same system using an XRD method. They completed an earlier work presented by Owen and O'Donnell Roberts [12]. ... In at 575 °C. In the range of 710–470 °C their values agree very well with the results of Owen and O'Donnell Roberts. ...
Journal of Solid State Chemistry, 1992
Trimorphism is presented in the form of a topological description as the capability of a chemical... more Trimorphism is presented in the form of a topological description as the capability of a chemical substance to exist under five aggregation states: three crystalline solid forms, the liquid, and the vapor. The general rules to construct the corresponding (p, T) diagram and to locate the 10 triple points are given and discussed. Several theoretical diagrams are presented in the case in which one deals with only three stable triple points. An example of application is given for the dimethyl 3,6-dichloro-2,5dihydroxyterephthalate. Hierarchies of stability among the three forms are inferred qualitatively as a function of increasing pressure and, quantitatively, also in domains of temperatures lower than those investigated by other authors in a previous experimental work. These stability hierarchies show a great sensitivity to the choice of an enthalpy change value, with respect to another of the same quantity, in determining the slopes of the two-phase equilibrium curves.
Journal of Solid State Chemistry, 1984
Abstract The preparation and structural features of compounds of the general formula (R O) n (M x... more Abstract The preparation and structural features of compounds of the general formula (R O) n (M x X y ) , with R =rare earth, M =IB, IIIA, IVA, or VA elements, and X =S or Se, are described. Four families of oxysulfides can be prepared by the reaction of a rare earth oxysulfide and a post-transition metal sulfide. These include (R O) 4 Ga 2 S 5 for R =Ce(tetragonal P4/mmm ) and R =Pr to Sm(orthorhombic Pbca of the type (NdO) 4 Ga 2 S 5 ); (R O) 4 Ca 1.33 S 4 for R =La and Ce(tetragonal P4/mmm ); (R O) 4 Ge 1.5 S 5 for R =La to Nd(orthorhombic Pbca type (NdO) 4 Ga 2 S 5 ); (R O) 4 Sn 2 S 6 for R =La to Nd(orthorhombic pbnm type (LaO) 4 Sn 2 S 6 ). The reaction of lanthanum oxyselenide and the metal selenide gives (LaO)GaSe 2 , (LaO)InSe 2 , (LaO) 4 Ge 1.5 Se 5 , (LaO) 4 Sn 2 Se 6 , and (LaO)SbSe 2 . Crystal data are given for these systems. Although these compounds crystallize in several different space groups, they all have sheet structures formed by alternation of an oxide sheet ( R O) and a sulfide or selenide sheet ( M x X y ). They belong to 7 new structural types. The ( R O) sheets have the same tetragonal or pseudotetragonal array of R 4 O tetrahedra, but the ( M x X y ) sheets have various structures, with 2, 3, or 4 layers of X atoms. The structural characters of these compounds are discussed.
Journal of Solid State Chemistry, 1987
The two isomorphous compounds LaCrOSâ and LaCrOSeâ are ferromagnetic (T/sub c/ = 35 and 51 K, res... more The two isomorphous compounds LaCrOSâ and LaCrOSeâ are ferromagnetic (T/sub c/ = 35 and 51 K, respectively). This implies ferromagnetic super-superexchange interactions. NdCrOSâ is antiferromagnetic (T/sub N/ = 72 K) and undergoes a spin-flop transition (H/sub c/ = 54 KOe at 20 K). The study of the thermal variation of Cr/sup 3 +/ and Nd/sup 3 +/ magnetic moments below T/sub N/ allows a rough estimate of the Cr-Nd and Cr-Cr exchange fields ratio (approx.0.1).
Journal of Solid State Chemistry, 1988
Two series of compounds are described with the light lanthanides (from La to Tb) with n = 2 and 3... more Two series of compounds are described with the light lanthanides (from La to Tb) with n = 2 and 3. They are obtained by direct union at 1400°C of R202S and UOS. The n = 2 series, of U2RZ04S3 composition, is isostructural with Ce404S3 (or Ce~"Ce~"O&). The n = 3 series, of U&O& composition, is isostructural with CesO& (or Ce~"Ce~'O&). The orthorhombic structures of these compounds result in periodic sheers in the structural array of hexagonal R202S. The crystal parameters of the two series of compounds are determined. In the case of lanthanum, compounds are formed by periodic sheers having longer periods than the preceding ones. All the terms from n = 2 to n = 6 are described and their crystal parameters are determined. 8 1988 Academic press, IK.
Journal of Solid State Chemistry, 1989
PrCrOS2 is antiferromagnetic with TN = 83 K. The magnetic space group is Bp2'... more PrCrOS2 is antiferromagnetic with TN = 83 K. The magnetic space group is Bp2'/m'. The variations of muCr and muPr with temperature were studied. The properties of PrCrOS2 are very similar to those of NdCrOS2.
Journal of Solid State Chemistry, 1995
Journal of Solid State Chemistry, 1993
ABSTRACT
Journal of Non-Crystalline Solids, 1998
The Ag 2 S±Ga 2 S 3 ±GeS 2 pseudo ternary system shows a large glass-forming region. Ternary glas... more The Ag 2 S±Ga 2 S 3 ±GeS 2 pseudo ternary system shows a large glass-forming region. Ternary glass formation does not reach the Ga 2 S 3 ±Ag 2 S binary system. Electrical properties of the glasses were investigated by measuring complex impedance. For instance, at 298 K, for the xAg 2 S±Ga 2 S 3 ±(9 A x)GeS 2 compositions (x 1±6) electrical conductivity and activation energy vary roughly between 10 À10 and 10 À5 S cm À1 , and 0.60 and 0.34 eV, respectively. Ionic transference number measurements and electronic transference number estimates indicate that these glasses are essentially ionic conductors.
Journal of Alloys and Compounds, 1993
Abstract The phase diagram of the AgSbSe system was studied by differential thermal analysis, X... more Abstract The phase diagram of the AgSbSe system was studied by differential thermal analysis, X-ray diffraction and metallography analysis. Two ternary phases were observed: the AgSbSe 2 compound, an f.c.c. NaCl-like structure with congruent melting and a new phase, to which the formula Ag 3 Sb 7 Se 12 is attributed. This last compound is dimorphic and the transition between the two forms occurs at about 200 °C. The high temperature structure disappears at about 360 °C. Four quasi-binary sections are described in this ternary system. Seven ternary invariants are characterized: five eutectics of which two are degenerated at the selenium apex, and two peritectics. In the temperature range between 360 and 558 °C, besides the seven three-phase domains, there are five two-phase domains. Three ternary liquid-liquid miscibility gaps are observed, of which only two are crossed by a valley. Finally, a glass domain with a small extension, which comes from a binary glass zone rich in selenium of the SbSe system, was established within the (AgSbSe 2 )SeSb 2 Se 3 triangle.