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Tellurium‐Niobium Oxides
Author(s) -
Bart J. C. J.,
Petrini G.
Publication year - 1980
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19804660110
Subject(s) - niobium , oxide , isomorphism (crystallography) , tellurium , niobium oxide , phase (matter) , materials science , powder diffraction , crystallography , complex oxide , inorganic chemistry , chemistry , crystal structure , metallurgy , organic chemistry
The solid‐state reaction between TeO 2 and Nb 2 O 5 was studied by means of X‐ray powder diffraction, at room temperature, using samples prepared in the interval of 500°C to 850°C. Several whitish coloured stable mixed oxide phases have been found, corresponding to the formulas TeO 2 · 3Nb 2 O 5 , 3TeO 2 · Nb 2 O 5 and 4TeO 2 · Nb 2 O 5 . The phase distribution differs from that in TeO 2 V 2 O 5 and TeO 2 Ta 2 O 5 systems and no isomorphism relationships with phases in these oxide systems have been noticed.