Discovering new oxides

Douglas A. Vander Griend, Sylvie Malo, Tony K. Wang, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The formation of many oxides with unpredictable structures can be attributed to a balance between stable and unstable compositions. A surprising number of the members of the Ln4Cu3MoO12 and Ln'2Ln''2-Cu3MoO12 (Ln = La - Nd, Sm - Lu) families form, all crystallizing in a hexagonal structure similar to that of YMnO3. Some do not form because either the average lanthanide size is too small (rβ(Ln) <105 pm, where r(Ln) ≡ 9-coordinate trivalent lanthanide radii) or the difference between the size of Ln' and Ln'' is too large (Δr(Ln) > 14 pm). Furthermore, even if Ln'4Cu3MoO12 and Ln''4Cu3MoO12 form single phases, attempts to synthesize the corresponding solution phase, Ln'2Ln''2Cu3MoO12, may result in a mixture of simpler metal oxides. The explanation illuminates the importance of unstable 'umbrella' stoichiometries for the formation of unconventional structures in multication systems.

Original languageEnglish
Pages (from-to)7308-7311
Number of pages4
JournalJournal of the American Chemical Society
Volume122
Issue number30
DOIs
Publication statusPublished - Aug 2 2000

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Oxides
Lanthanoid Series Elements
Rare earth elements
Stoichiometry
Metals
Chemical analysis

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Discovering new oxides. / Vander Griend, Douglas A.; Malo, Sylvie; Wang, Tony K.; Poeppelmeier, Kenneth R.

In: Journal of the American Chemical Society, Vol. 122, No. 30, 02.08.2000, p. 7308-7311.

Research output: Contribution to journalArticle

Vander Griend, DA, Malo, S, Wang, TK & Poeppelmeier, KR 2000, 'Discovering new oxides', Journal of the American Chemical Society, vol. 122, no. 30, pp. 7308-7311. https://doi.org/10.1021/ja000963y
Vander Griend, Douglas A. ; Malo, Sylvie ; Wang, Tony K. ; Poeppelmeier, Kenneth R. / Discovering new oxides. In: Journal of the American Chemical Society. 2000 ; Vol. 122, No. 30. pp. 7308-7311.
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