Hot stage X-ray diffractometer studies on Ag2PbI4 and Ag4PbI6 |
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Authors: | JW Brightwell CN Buckley B Ray |
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Institution: | Faculty of Applied Science, Coventry (Lanchester) Polytechnic, Priory Street, Coventry CV1 5FB,UK |
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Abstract: | Mixtures of AgI and PbI2 cooled from the melt result in the peritectic formation of a fast ion conducting phase centred about Ag4PbI6, which is face centred cubic with a = 6.33(5)A; this phase exhibits high electrical conductivity. On cooling to about 125°C, dissociation occurs to γAgI and PbI2, accompanied by the transient formation of another phase, centred about Ag2PbI4. A modified form of the T-x section of the equilibrium phase diagram at AgI concentrations greater than 60 mole % and below 300°C is proposed. |
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