Electrochemical properties of Ag5Te2Cl 0.8Br0.2, a representative of the solid solutions Ag 5Te2Cl1-xBrx

Melanie Bawohl, Tom Nilges

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Impedance spectroscopic investigations of Ag5Te 2Cl0.8Br0.2, a selected representative of the solid solutions Ag5Te2Cl1-xBrx with x = 0-1, proved the mixed-conducting property of this class of materials. Two polymorphs are realized in the temperature range of 309 to 410 K, the monoclinic β-phase (space group P21/n) and the tetragonal α-phase (space group 14/mcm) with an order-disorder phase transition temperature of 336 K (DSC). A sharp increase of the total and ionic conductivity can be observed at 337 K, in good accordance with the phase transition temperature. The electronic conductivity exceeds the ionic conductivity by approximately one order of magnitude over a wide range of temperature. Conductivities are σion = 6.9 × 10-5 (309 K) and σtot = 4.80 × 10-4 Ω-1 cm-1 (310 K) for β-Ag5Te2Cl 0.8Br0.2 and σion = 1.6 × 10 -2 (395 K) and σtot = 1.73 × 10-1 Ω-1 cm-1 (394 K) for α-Ag5Te 2Cl0.8Br0.2.

Original languageEnglish
Pages (from-to)1083-1086
Number of pages4
JournalZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Issue number9
StatePublished - Sep 2008
Externally publishedYes


  • Impedance spectroscopy
  • Mixed conductors
  • Silver(I) chalcogenide halides


Dive into the research topics of 'Electrochemical properties of Ag5Te2Cl 0.8Br0.2, a representative of the solid solutions Ag 5Te2Cl1-xBrx'. Together they form a unique fingerprint.

Cite this