Journalartikel

PREPARATION AND STRUCTURE OF NIOBIUM TUNGSTEN-OXIDES (NB,W)(17)O-47 WITH MIXED-VALENCY


AutorenlisteKRUMEICH, F; HUSSAIN, A; BARTSCH, C; GRUEHN, R

Jahr der Veröffentlichung1995

Seiten799-806

ZeitschriftJournal of Inorganic and General Chemistry

Bandnummer621

Heftnummer5

ISSN0044-2313

DOI Linkhttps://doi.org/10.1002/zaac.19956210517

VerlagWiley


Abstract
The formal substitution of 2Nb(5+) by Nb4+ or W4+, respectively, and W6+ leads to tungsten niobium oxides (Nb,W)(17)O-47 with mixed valency. The phases Nb8-nW9+nO47 with n = 1 to 5 could be obtained by heating (1250 degrees C) mixtures of NbO2 or WO2, respectively, with Nb2O5 and WO3. The products crystallize with the structure of Nb8W9O47. This is proved by X-ray powder diffraction and transmission electron microscopy. A further decrease of the Nb-content results in two-phase products.



Zitierstile

Harvard-ZitierstilKRUMEICH, F., HUSSAIN, A., BARTSCH, C. and GRUEHN, R. (1995) PREPARATION AND STRUCTURE OF NIOBIUM TUNGSTEN-OXIDES (NB,W)(17)O-47 WITH MIXED-VALENCY, Zeitschrift für anorganische und allgemeine Chemie = Journal of Inorganic and General Chemistry, 621(5), pp. 799-806. https://doi.org/10.1002/zaac.19956210517

APA-ZitierstilKRUMEICH, F., HUSSAIN, A., BARTSCH, C., & GRUEHN, R. (1995). PREPARATION AND STRUCTURE OF NIOBIUM TUNGSTEN-OXIDES (NB,W)(17)O-47 WITH MIXED-VALENCY. Zeitschrift für anorganische und allgemeine Chemie = Journal of Inorganic and General Chemistry. 621(5), 799-806. https://doi.org/10.1002/zaac.19956210517



Schlagwörter


BLOCK STRUCTURESHRTEMMIXED VALENCYNB8W9O47NIOBIUM TUNGSTEN OXIDESNON-STOICHIOMETRIC COMPOUNDS


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