Étude du diagramme ternaire Ag-As-Se I: Description du triangle Se-Ag2Se-As2Se3

Houphouet-Boigny, D.; Éholié, R.; Ollitrault‐Fichet, R.; Flahaut, Jean

doi:10.1016/0022-5088(84)90272-8

Cited by 15 publications

(8 citation statements)

References 9 publications

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“…X-ray powder diffraction patterns for phase analysis were recorded using a DRON-4-13 powder diffractometer (CuK α radiation, 10°≤2θ≤90°, step scan mode with a step size of 0.05° and counting time of 1 s per data point). The X-ray powder diffraction The temperatures of the nonvariant processes are similar to those reported in [7] (Table 1). However, a polymorphic transformation of AgAsSe 2 at 658 K was observed.…”

Section: Methodssupporting

confidence: 69%

“…The AgAs 3 Se 5 compound (unknown structure) forms according to the peritectic reaction L + AgAsSe 2 ↔ AgAs 3 Se 5 at 643 K and forms together with As 2 Se 3 a eutectic at 90 mol.% As 2 Se 3 and 630 K. The AgAsSe 2 compound was found to melt congruently at 673 K, but no polymorphic transformation was observed. The peritectic reaction L + Ag 2 Se ↔ Ag 3 AsSe 3 at 663 K was also observed in [7].…”

Section: Semiconductors / Phase Diagram / Crystal Structure / X-ray Pmentioning

confidence: 68%

“…The formation of three compounds: Ag 3 AsSe 3 , AgAsSe 2 and AgAs 3 Se 5 , in the Ag 2 Se-As 2 Se 3 system was established in [7]. The AgAs 3 Se 5 compound (unknown structure) forms according to the peritectic reaction L + AgAsSe 2 ↔ AgAs 3 Se 5 at 643 K and forms together with As 2 Se 3 a eutectic at 90 mol.% As 2 Se 3 and 630 K. The AgAsSe 2 compound was found to melt congruently at 673 K, but no polymorphic transformation was observed.…”

Section: Semiconductors / Phase Diagram / Crystal Structure / X-ray Pmentioning

confidence: 99%

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Phase diagram of the Ag2Se–As2Se3 system and crystal structure of the AgAs3Se5 compound

Klymovych¹,

Zmiy²,

Gulay³

et al. 2008

Chem. Met. Alloys

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The phase diagram of the quasi-binary Ag 2 SeAs 2 Se 3 system was constructed using differential-thermal and X-ray phase analyses. The crystal structure of the ternary AgAs 3 Se 5 compound (space group R   m, a = 0.38195(1) nm, c = 5.0082(2) nm, R I = 0.0868) was investigated using X-ray powder diffraction. The Se atoms form a close-packed arrangement with the layers stacked in the sequence ABC. The atoms of a statistical mixture M (0.5Ag+0.5As) and the remaining As atoms occupy 4/5 of the octahedral interstices.

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Section: Methodssupporting

confidence: 69%

Section: Semiconductors / Phase Diagram / Crystal Structure / X-ray Pmentioning

confidence: 68%

Section: Semiconductors / Phase Diagram / Crystal Structure / X-ray Pmentioning

confidence: 99%

See 1 more Smart Citation

Phase diagram of the Ag2Se–As2Se3 system and crystal structure of the AgAs3Se5 compound

Klymovych¹,

Zmiy²,

Gulay³

et al. 2008

Chem. Met. Alloys

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“…The results of their investigation of the Ag2Se-As2Se3 system are shown that, the formation of three compounds, Ag3AsSe3, AgAsSe2, and AgAs3Se5 was confirmed (8). The temperatures of the non-variant processes are similar to those reported in (9). However, a polymorphic transformation of AgAsSe2 at 658 K was observed.…”

Section: Introductionmentioning

confidence: 51%

Production Of Nanoparticles Of AgAsSe2 and Ag3AsSe3 Compounds

Suleymanova¹

2017

Journal of the Turkish Chemical Society Section A: Chemistry

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Ternary compounds (nano-and microparticles) of AgAsSe2 and Ag3AsSe3 have been synthesized from approximately equimolar mixtures of silver nitrate, sodium metaarsenite and sodium selenosulfate with prepared by refluxing selenium powder with concentrated sodium sulfite solution under hydrothermal conditions in ethylene glycol medium. The solutions were put into a 100 mL Teflon-lined stainless steel autoclave Speedwave four BERGHOF and sealed and then heated at the temperature of 443 K during 8 hours (pH = 5-4). The products were filtered via the glass filter and washed by deionized water and absolute ethanol for several times, then dried at 353 K in a vacuum oven for at least 1 hour for analysis. The thermogravimetric (TG) and electron microprobe analysis have been carried out. The results showed that the composition of silver selenoarsenate compounds corresponded to the formulas AgAsSe2 and Ag3AsSe3. The results of SEM images and shows the typical morphologies of synthesized products in which tubular-and stick-shaped like nano-particles can be observed and their size can be estimated from 140 nm to 310 nm. The compound of AgAsSe2 and Ag3AsSe3 was constructed using X-ray phase and differential-thermal analyses. It is ascertained by X-ray powder diffraction (XRD) that the parameters of AgAsSe2 crystallized in the tetragonal space group R3m with a = 12.54 Å, c = 11.14 Å, α = 90°, β = 90°, γ = 90°, Z = 5, Ag3AsSe3 (this compound is an allotrope of β-Ag3AsSe3) crystallizes in the orthorhombic space group Pnma, a = 8.11 Å, b = 11.34 Å, c = 20.73 Å, α = 90°, β = 90°, γ = 90°, Z = 8. The results of differential thermal analysis (DTA) AgAsSe2 compound melts congruently at Tg = 683 K, Ag3AsSe3 with incongruent type of melting at Tg = 663 K was established.

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“…The Ag 2 Se-SnSe 2 polythermal section of the ternary Ag-Sn-Se system has been investigated in [2,3], but information on the quasi-binary SnSe 2 -As 2 Se 3 system is absent in the literature. The Ag 2 Se-As 2 Se 3 system has been investigated in [4][5][6]. The authors of [6] confirmed the existence of the compounds Ag 3 AsSe 3 and AgAsSe 2 that were reported in [4,5] and discovered the compound AgAs 3 Se 5 with unknown structure.…”

Section: Introductionmentioning

confidence: 67%

Interaction of the components in the Ag2Se–SnSe2–As2Se3 system

Zmiy¹,

Gulay²,

OSTAPYUK³

et al. 2008

Chem. Met. Alloys

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The isothermal section of the quasi-ternary Ag 2 Se-SnSe 2-As 2 Se 3 system at 520 K was constructed using differential-thermal and X-ray phase analyses. The existence of a quaternary compound, Ag 2 SnAs 6 Se 12 (space group R 3 m, a = 0.38118(1) nm, c = 3.9724(3) nm) with incongruent type of melting at 690 K, was established. The Se atoms in the structure of the Ag 2 SnAs 6 Se 12 compound are stacked in a close-packed arrangement with the layers in the sequence ABC. A statistical mixture of cations (0.333Ag+0.167Sn+0.500As) occupy one half of the octahedral interstices. The remaining As atoms are distributed over the other octahedral interstices.

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Étude du diagramme ternaire Ag-As-Se I: Description du triangle Se-Ag2Se-As2Se3

Cited by 15 publications

References 9 publications

Phase diagram of the Ag2Se–As2Se3 system and crystal structure of the AgAs3Se5 compound

Phase diagram of the Ag2Se–As2Se3 system and crystal structure of the AgAs3Se5 compound

Production Of Nanoparticles Of AgAsSe2 and Ag3AsSe3 Compounds

Interaction of the components in the Ag2Se–SnSe2–As2Se3 system

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