Topochemically controlled hydrogen reduction of scheelite-related rare-earth metal molybdates

Gopalakrishnan, Jagannatha and Manthiram, Arumugam (1981) Topochemically controlled hydrogen reduction of scheelite-related rare-earth metal molybdates. In: Journal Of The Chemical Society-Dalton Transactions (3). 668 - 672.

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Abstract

Scheelite-related -Ln2Mo3O12(Ln = La, Pr, Nd, Sm, Gd, Tb, or Dy) oxides are reduced by hydrogen at 780–870 K yielding molybdenum (IV) oxides of formula Ln2Mo3O9. The latter crystallize in a tetragonal scheelite (ABO4) type structure where one third of the A sites and a quarter of the anion sites are vacant: Ln2/3(cat)1/3MoO3(an). The reaction Ln2Mo3O12+ 3H2 Ln2Mo3O9(an)3+ 3H2O may be regarded as topochemically controlled, since both the parent and the product phases have scheelite-related structures. Infrared spectra and electrical and magnetic properties of these metastable defect scheelite phases are reported.

Item Type:	Journal Article
Publication:	Journal Of The Chemical Society-Dalton Transactions
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:	24 Dec 2009 09:13
Last Modified:	19 Sep 2010 05:47
URI:	http://eprints.iisc.ac.in/id/eprint/23781

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