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Electrical conductivity of (Bi,Pb)2MO4(M = Pd,Pt) linear chain compounds

Authors
Journal
Journal of Physics and Chemistry of Solids
0022-3697
Publisher
Elsevier
Publication Date
Volume
46
Issue
3
Identifiers
DOI: 10.1016/0022-3697(85)90169-6

Abstract

Abstract Partial oxidation of Pd in Bi 2PdO 4 is achieved by substitution of Pb 2+ for Bi 3+ up to Bi 1 91Pb 0 09PdO 4, partial oxidation is necessary to stabilize the isostructural Pt compound, Bi 1− x Pb x PtO 4 within the range 0.33 ⩽ x ⩽ 0.52. In both cases, the tetragonal cell c parameter, therefore metal-metal distance (d M−M = c 2 ) , decreases linearly with increasing mean oxidation degree (MOD) of transition metal atom For the insulator B1 2CuO 4, no substitution occurs Powder electrical conductivity measurements of the partially oxidized compounds show that these materials are semiconductors Platinum compounds exhibit relatively high conductivities (σ≅10 (Ω cm) −1) and low activation energies (≅0 02 eV) with small variations with x Palladium compounds exhibit lower conductivities which linearly increases with MOD These electronic properties are comparable with those of the most one-dimensional Pt or Pd chain conductors.

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