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- W2950976965 abstract "Abstract The synthesis and physical properties of the new distorted-Hollandite PbIr4Se8 are reported. Powder X-ray diffraction and transmission electron microscopy show that the structure consists of edge- and corner-sharing IrSe6 octahedra, with one-dimensional channels occupied by Pb. The structure contains Se-Se anion-anion bonding, leading to an electron count of Pb2+(Ir3+)4(Se2)2-(Se2−)6, confirmed by bond-valence sums and diamagnetic behavior. Structural and heat capacity measurements demonstrate disorder on the Pb site, due to the combination of lone-pair effects and the large size of the one-dimensional channels. Comparisons are made to known Hollandite and pseudo-Hollandite structures, which demonstrates that the anion-anion bonding in PbIr4Se8 distorts its structure, to accommodate the Ir3+ state. An electronic structure calculation indicates semiconductor character with a band gap of 0.76(11) eV." @default.
- W2950976965 created "2019-06-27" @default.
- W2950976965 creator A5040550673 @default.
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- W2950976965 date "2016-10-01" @default.
- W2950976965 modified "2023-09-27" @default.
- W2950976965 title "ChemInform Abstract: Structure, Properties, and Disorder in the New Distorted-Hollandite PbIr4Se8." @default.
- W2950976965 cites W2467634140 @default.
- W2950976965 doi "https://doi.org/10.1002/chin.201645019" @default.
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