New mixed conductors, AgxIwBi2Sr2Can-1CunOy (0.75 < x < 1.2, n = 1, 2, and 3)

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作者：
Kim, Young-Il [1 ]
Choy, Jin-Ho [1 ]
机构：
[1] Natl Univ, Seoul, Korea, Republic of
来源：
Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals | 1998年 / 311卷
关键词：
Electronic density of states - Iodine - Physical properties - Semiconducting bismuth compounds - Silver - Superconducting materials - Surface structure - X ray powder diffraction;
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摘要：
New intercalation compounds, AgxIwBi2Sr2Can-1CunOy (0.75 c superconductor, Bi2Sr2Can-1CunOy. For all three cases (n = 1, 2, and 3), powder XRD analysis indicated that the Ag-I intercalation expanded the [Bi-O]2 double slabs within host block by approx. 7.3 angstrom, with subtle changes in physical properties of the pristine. From the Fourier 1- dimensional electron density mapping and the extended X-ray absorption fine structure (EXAFS) analysis to configure the interlayer structure of AgxIw sublattice, it was revealed that the two-dimensional AgxIw species retained a similar iodine skeleton as found in β-AgI, but with a slightly distorted Ag+ position. The Ag+ ionic conductivity of AgxIwBi2Sr2Can-1CunOy was turned out to be comparable with that of well known superionic conductors.
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页码：423 / 428
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