Thermodynamic Study of the SmS2–SmS1.5System

Vasilyeva, I.G.; Belyaeva, E. I.

doi:10.1006/jssc.1998.7802

Cited by 12 publications

(5 citation statements)

References 4 publications

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“…Syntheses were performed as described in ref. [8][9][10]; pure single crystals were obtained, as confirmed by X-ray powder analysis and by Energy Dispersive X-ray Analysis (EDXA).…”

Section: Methodsmentioning

confidence: 99%

Thermodynamic study of the systems PrSe2.00–PrSe1.50 and GdSe1.875–GdSe1.50

Chusova

Зеленина

Vasilyeva

et al. 2008

Journal of Alloys and Compounds

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“…Syntheses were performed as described in ref. [8][9][10]; pure single crystals were obtained, as confirmed by X-ray powder analysis and by Energy Dispersive X-ray Analysis (EDXA).…”

Section: Methodsmentioning

confidence: 99%

Thermodynamic study of the systems PrSe2.00–PrSe1.50 and GdSe1.875–GdSe1.50

Chusova

Зеленина

Vasilyeva

et al. 2008

Journal of Alloys and Compounds

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“…When this work was finished Vasilyeva et al (1999) have reported from thermodynamic measurements of the system SmS 2 ± ±SmS 1.5 . They found three discrete stoichiometric phases: SmS 1.900 , SmS 1.893 and SmS 1.863 .…”

Section: Introductionmentioning

confidence: 99%

Contribution to the crystal chemistry of rare earth chalcogenides. III. The crystal structure and twinning of SmS_1.9

Tamazyan¹,

Arnold²,

Molchanov³

et al. 2000

Zeitschrift Für Kristallographie - Crystalline Materials

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The structure of samarium disulfide SmS 1.9, space group P4 2 /n; lattice constants a 19.717(2) A; c 15.928(1) A has been determined and refined by LS method to R 0.0345; R w 0.0419. The structure is a tenfold superstructure from the structure type ZrSSi.[S 2 ] 2± ± dumbbells with interatomic distances 2.146(1) A between S atoms were observed in the structure. Fully ordered vacancies and orientation of the [S 2 ] 2± ± dumbbells are responsible for the formation of the superstructure. The investigated sample was twinned by the reticular merohedral law, the twin symmetry is 4/mm H m H , the twinning symmetry elements are (310) and (120) mirror planes and the twin index is n 5.

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“…The reaction of La and Nd oxides with H 2 S begins only at 700 °C,39b and the reaction temperature could be lowered only to 500 °C under a high-pressure condition . In the previous studies of others, crystals of the rare-earth disulfides could form when the corresponding sesquisulfides were treated with elemental sulfur over 600 °C, but still in a low yield . LaS 2 and PrS 2 have been prepared from the reactions of the corresponding chlorides and bromides with K 2 S 2 at temperatures as low as 300 °C after which the unreacted starting materials were washed away 4b…”

Section: Resultsmentioning

confidence: 99%

New Solid−Gas Metathetical Synthesis of Binary Metal Polysulfides and Sulfides at Intermediate Temperatures: Utilization of Boron Sulfides

Seo

2004

J. Am. Chem. Soc.

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A new simple synthetic method for binary metal polysulfides and sulfides was developed by utilizing an in situ formation of boron sulfides and their subsequent reactions with metal-source oxides in a closed container at intermediate temperatures above 350 degrees C at which the boron sulfides react in a gaseous form. The versatility of the new method is demonstrated with oxides of various transition metals (Ti, V, Mn, Fe, Ni, Nb, Mo, Ru, and W) and rare-earth metals (Y, Ce, Nd, Sm, Eu, Tb, and Er) as starting materials that exhibit different chemical characteristics. Regardless of the oxidation states of metals in the starting materials, the sulfidation reactions occurred quantitatively with stoichiometric mixtures of boron and sulfur, and within 24 h the reactions yielded pure products of TiS(2), TiS(3), VS(4), FeS(2), NiS(2), NbS(3), MoS(2), RuS(2), WS(2), Y(2)S(3), and RS(2) (R = Ce, Nd, Sm, Eu, Tb, and Er) which were the thermodynamically stable phases under the reaction conditions. The scope and implications of the new sulfidation method are also discussed.

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Thermodynamic Study of the SmS2–SmS1.5System

Cited by 12 publications

References 4 publications

Thermodynamic study of the systems PrSe2.00–PrSe1.50 and GdSe1.875–GdSe1.50

Thermodynamic study of the systems PrSe2.00–PrSe1.50 and GdSe1.875–GdSe1.50

Contribution to the crystal chemistry of rare earth chalcogenides. III. The crystal structure and twinning of SmS_1.9

New Solid−Gas Metathetical Synthesis of Binary Metal Polysulfides and Sulfides at Intermediate Temperatures: Utilization of Boron Sulfides

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Thermodynamic Study of the SmS2–SmS1.5System

Cited by 12 publications

References 4 publications

Thermodynamic study of the systems PrSe2.00–PrSe1.50 and GdSe1.875–GdSe1.50

Thermodynamic study of the systems PrSe2.00–PrSe1.50 and GdSe1.875–GdSe1.50

Contribution to the crystal chemistry of rare earth chalcogenides. III. The crystal structure and twinning of SmS1.9

New Solid−Gas Metathetical Synthesis of Binary Metal Polysulfides and Sulfides at Intermediate Temperatures: Utilization of Boron Sulfides

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Contribution to the crystal chemistry of rare earth chalcogenides. III. The crystal structure and twinning of SmS_1.9