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Issue 2, 1997
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A new charge density wave oxide, LiVMoO5, and itstungsten analogue obtained by topotactic reduction of LiVMO6(M=Mo, W) brannerites

Abstract

We report the synthesis of two new low-dimensional oxides, LiVMO 5 (M=Mo, W), which contain S=½ transition-metal atoms, V IV :3d 1 and Mo V :4d 1 /W V :5d 1 , by topotactic reduction of the LiVMO 6 brannerites in hydrogen. LiVMO 5 crystallizes in orthorhombic structures related to the parent brannerite structure. The VMO 5 network of the new oxides is likely to correspond to one of the A 2 X 5 structures predicted by A. F. Wells (Philos. Trans. R. Soc. London A, 1984, 312, 589). LiVMoO 5 is metallic showing a charge density wave (CDW) instability around 230 K; interestingly, LiVWO 5 is a paramagnetic semiconductor down to 20 K.

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Article type: Paper
DOI: 10.1039/A606392F
Citation: J. Mater. Chem., 1997,7, 307-310

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    A new charge density wave oxide, LiVMoO5, and its tungsten analogue obtained by topotactic reduction of LiVMO6 (M=Mo, W) brannerites

    J. Gopalakrishnan, N. S. P. Bhuvanesh, R. Vijayaraghavan and N. Y. Vasanthacharya, J. Mater. Chem., 1997, 7, 307
    DOI: 10.1039/A606392F

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