Journal article
Authors list: KRUMEICH, F; HUSSAIN, A; BARTSCH, C; GRUEHN, R
Publication year: 1995
Pages: 799-806
Journal: Journal of Inorganic and General Chemistry
Volume number: 621
Issue number: 5
ISSN: 0044-2313
DOI Link: https://doi.org/10.1002/zaac.19956210517
Publisher: Wiley
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.
Citation Styles
Harvard Citation style: KRUMEICH, 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 Citation style: KRUMEICH, 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
Keywords
BLOCK STRUCTURES; HRTEM; MIXED VALENCY; NB8W9O47; NIOBIUM TUNGSTEN OXIDES; NON-STOICHIOMETRIC COMPOUNDS
