Luminescent Properties of Silver(I) Diphosphate of Compositions Na2−xAgxZnP2O7

Belharouak, Ilias; Parent, C.; Gravereau, P.; Chaminade, Jean‐Pierre; Flem, G. Le; Moine, B.

doi:10.1006/jssc.1999.8528

Cited by 28 publications

(20 citation statements)

References 19 publications

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“…The structures of the Ag 2 ZnP 2 O 7 and Na 2 ZnP 2 O 7 are under comment in the literature [9,10]. The previous results show that Ag 2 ZnP 2 O 7 , isotype of Na 2 ZnP 2 O 7 , is of tetragonal symmetry with the space group P4 2 /n.…”

Section: Introductionmentioning

confidence: 94%

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Dielectric relaxation and ionic conductivity studies of Ag2ZnP2O7

Rhaiem

Chouaib

Guidara

2009

Ionics

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The complex impedance of the Ag 2 ZnP 2 O 7 compound has been investigated in the temperature range 419-557 K and in the frequency range 200 Hz-5 MHz. The Z′ and Z′ versus frequency plots are well fitted to an equivalent circuit model. Dielectric data were analyzed using complex electrical modulus M* for the sample at various temperatures. The modulus plot can be characterized by full width at half-height or in terms of a non-exponential decay function f t ð Þ ¼ exp Àt=t ð Þ b . The frequency dependence of the conductivity is interpreted in terms of Jonscher's law: s w ð Þ ¼ s dc þ Aw n . The conductivity σ dc follows the Arrhenius relation. The near value of activation energies obtained from the analysis of M″, conductivity data, and equivalent circuit confirms that the transport is through ion hopping mechanism dominated by the motion of the Ag + ions in the structure of the investigated material.

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Section: Introductionmentioning

confidence: 94%

“…2). ZnO 4 tetrahedra share four oxygens with P 2 O 7 pyrophosphate groups, and the Ag + cations appear in AgO 8 quadrangular prismatic coordination geometry [9].…”

Section: X-ray Powder Analysismentioning

confidence: 99%

Dielectric relaxation and ionic conductivity studies of Ag2ZnP2O7

Rhaiem

Chouaib

Guidara

2009

Ionics

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“…In the particular case of the &&Ag O}ZnO}P O '' system the luminescent properties of the crystalline diphosphate Ag ZnP O were remarkable by the unusual silver(I) pair emission provided by Ag>}Ag> centers where the interatomic distance is comparable to the silver distance in metal. Actually such results have required the analysis of the optical properties of Na \V Ag V ZnP O compounds in order to determine the in#uence of silver concentration on the luminescent parameters (4). In this context it was of interest to have an exact description of the structure of the pure sodium phosphate assuming a progressive replacement of Na> by Ag>.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure of Na2ZnP2O7: Reinvestigation

Belharouak

Gravereau

Parent

et al. 2000

Journal of Solid State Chemistry

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“…In this work, we are going to present the electrical and dielectrical properties of the NaAgZnP 2 O 7 compound. It was mentioned by Belharouak et al [12], that the structure of the Na 2−x Ag x ZnP 2 O 7 compound can be described by the structure reported by Erragh et al of Na 2 ZnP 2 O 7 [13]. The structure is a typical layered organization.…”

Section: Introductionmentioning

confidence: 91%

“…In this context, our group is interested in the partially substituted compounds with chemical formula Na 2−x M x ZnP 2 O 7 (M = Li, Ag, K) in order to discuss the effect of the alkaline cation size on the ionic conduction. The Na 2−x Ag x ZnP 2 O 7 crystals have optical properties and the influence of silver concentration on the luminescent parameters has been studied [11,12]. In this work, we are going to present the electrical and dielectrical properties of the NaAgZnP 2 O 7 compound.…”

Section: Introductionmentioning

confidence: 98%