2009
DOI: 10.1007/s11664-009-0987-9
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Highly Dynamic Chalcogen Chains in Silver(I) (Poly)Chalcogenide Halides: a New Concept for Thermoelectrics?

Abstract: Coinage-metal(I) polychalcogenide halides represent a new class of materials featuring high ion dynamics of different substructures capable of an effective phonon scattering process in the solid state. The interplay of mobile coinagemetal ions such as Ag + or Cu + on the one hand and the temperature-driven redox reaction of a linear, partially covalent-bonded Te chain on the other hand is responsible for tremendous variations in the electronic structure of such materials. A huge drop of the Seebeck coefficient… Show more

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Cited by 11 publications
(12 citation statements)
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“…10. Surprisingly, the lower content of halide in this systems compared More recently, the newest example of a silver(I) polychalcogenide halide, Ag 20 Te 10 BrI [92], was reported also featuring Peierls-distorted Te strands and a highly mobile silver substructure. While the covalently bonded anion substructure also contains Peierls-like distorted Te chains the remaining noncovalently bonded anion substructure is characterized by another variation of corrugated and interpenetrated honeycomb nets.…”
Section: Covalent and Ionic Chalcogen Substructures -Coinage Metal Pomentioning
confidence: 82%
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“…10. Surprisingly, the lower content of halide in this systems compared More recently, the newest example of a silver(I) polychalcogenide halide, Ag 20 Te 10 BrI [92], was reported also featuring Peierls-distorted Te strands and a highly mobile silver substructure. While the covalently bonded anion substructure also contains Peierls-like distorted Te chains the remaining noncovalently bonded anion substructure is characterized by another variation of corrugated and interpenetrated honeycomb nets.…”
Section: Covalent and Ionic Chalcogen Substructures -Coinage Metal Pomentioning
confidence: 82%
“…The mentioned topologic approach can be generalized to other classes of compounds (e.g. sodium polytellurides) [92], to minerals like stuztite (Ag 4.53 Te 3 ) [94] and stutzite analogues [95]. 3 -nets which interpenetrate each other.…”
Section: Covalent and Ionic Chalcogen Substructures -Coinage Metal Pomentioning
confidence: 99%
“…Syntheses, structure analyses and physical properties of the title compounds were published elsewhere [2][3][4][5][6][7]. The compounds were either synthesized by high temperature melting and annealing procedures or solvothermal reactions.…”
Section: Methodsmentioning
confidence: 99%
“…Dependent on the overall X content of a compound, the halide ions are forming strands (X content of 1 to 4 in the modified sum formula of Scheme 1) or Kagomé-like 3.6.3.6 nets (X content of 6 and 7). The polyanion substructure is characterized by a partially covalently bonded and linear arrangement of (Te-[Te 2 ]-Te) n units capable to perform a dynamic Peierls distortion in the solid state [5][6][7]. Such a scheme or formalism has several advantages.…”
Section: A Structure Topological Approach For Silver(i)-(poly)chalcogmentioning
confidence: 99%
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