Multiple phase formation in the binary system Nb2O5WO3
作者： J.G. Allpress , A.D. Wadsley
DOI: 10.1016/0022-4596(69)90005-X
关键词: Solid-state chemistry 、 Lattice (order) 、 Niobium 、 Microscopy 、 Electron diffraction 、 Crystallography 、 Tungsten 、 Mole fraction 、 Chemistry 、 Binary system 、 Physical and Theoretical Chemistry 、 Inorganic chemistry 、 Materials Chemistry 、 Electronic, Optical and Magnetic Materials 、 Condensed matter physics 、 Ceramics and Composites
摘要: Abstract A number of high-temperature mixed oxides niobium and tungsten, containing less than 10 mole percent WO 3 , have been examined by electron diffraction microscopy. The unit cell dimensions symmetries three new phases found in this region determined. structures proposed for them are based upon the ordered intergrowth high temperature Nb 2 O 5 WNb 12 33 leading to ideal compositions 26 68 40 103 173 . Lattice images suitably oriented fragments these materials proved be particularly useful elucidating structural relationships between them. observations pose a questions concerning definitions solid state chemistry.
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sci-hub.se 参考文章(13)
S. Andersson, W. G. Mumme, A. D. Wadsley, Multiple phase formation in the binary system Nb2O5–WO3. The structure of W4Nb26O77, an ordered intergrowth of the adjoining compounds WNb12O33 and W3Nb14O44 Acta Crystallographica. ,vol. 21, pp. 802- 808 ,(1966) , 10.1107/S0365110X66003852
C. F. Cook, Observations of Sub‐Unit‐Cell Stacking Elements in Mixed‐Layer Structures by Electron Microscopy Journal of Applied Physics. ,vol. 38, pp. 2488- 2496 ,(1967) , 10.1063/1.1709934
J. G. Allpress, J. V. Sanders, A. D. Wadsley, Electron microscopy of high-temperature Nb2O5 and related phases Physica Status Solidi (b). ,vol. 25, pp. 541- 550 ,(1968) , 10.1002/PSSB.19680250206
J. A. Kohn, D. W. Eckart, Stacking relations in the hexagonal ferrites and a new series of mixed-layer structures* Zeitschrift Fur Kristallographie. ,vol. 119, pp. 454- 464 ,(1964) , 10.1524/ZKRI.1964.119.5-6.454
R. S. Roth, A. D. Wadsley, Multiple phase formation in the binary system Nb2O5–WO3. II. The structure of the monoclinic phases WNb12O33 and W5Nb16O55 Acta Crystallographica. ,vol. 19, pp. 32- 38 ,(1965) , 10.1107/S0365110X65002724
D. W. Eckart, J. A. Kohn, Sixteen new mixed-layer hexagonal ferrites Zeitschrift Fur Kristallographie. ,vol. 125, pp. 130- 133 ,(1967) , 10.1524/ZKRI.1967.125.125.130
R. S. Roth, A. D. Wadsley, Multiple phase formation in the binary system Nb2O5–WO3. I. Preparation and identification of phases Acta Crystallographica. ,vol. 19, pp. 26- 32 ,(1965) , 10.1107/S0365110X65002712
A. D. Wadsley, Mixed oxides of titanium and niobium. II. The crystal structures of the dimorphic forms Ti2Nb10O29 Acta Crystallographica. ,vol. 14, pp. 664- 670 ,(1961) , 10.1107/S0365110X6100200X
R. Gruehn, Neue Phasen in den Systemen Nb2O5-WO3 und Ta2O5-WO3 : 50. Mitt. über „Beiträge zur Chemie der Elemente Niob und Tantal” Monatshefte Fur Chemie. ,vol. 96, pp. 1789- 1792 ,(1965) , 10.1007/BF01185901
R. S. Roth, A. D. Wadsley, Multiple phase formation in the binary system Nb2O5–WO3. III. The structures of the tetragonal phases W3Nb14O44 and W8Nb18O69 Acta Crystallographica. ,vol. 19, pp. 38- 42 ,(1965) , 10.1107/S0365110X65002736