A new charge density wave oxide, $LiVMoO_5$ and its tungsten analogue obtained by topotactic reduction of $LiVMO_6$ (M=Mo,W) brannerites

Gopalakrishnan, Jagannatha and Bhuvanesh, NSP and Vijayaraghavan, R and Vasanthacharya, NY (1997) A new charge density wave oxide, $LiVMoO_5$ and its tungsten analogue obtained by topotactic reduction of $LiVMO_6$ (M=Mo,W) brannerites. In: Journal of Materials Chemistry, 7 (2). pp. 307-310.

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Abstract

We report the synthesis of two new low-dimensional oxides, LiVMO(5) (M = Mo, W), which contain S = 1/2 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). LiVMoO5 is metallic showing a charge density wave (CDW) instability around 230 K; interestingly, LiVWO5 is a paramagnetic semiconductor down to 20 K.

Item Type:	Journal Article
Publication:	Journal of Materials Chemistry
Publisher:	Royal Society of Chemistry
Additional Information:	Copyright of this article belongs to Royal Society of Chemistry.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	04 Feb 2010 07:33
Last Modified:	19 Sep 2010 05:01
URI:	http://eprints.iisc.ac.in/id/eprint/18323

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