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Nb2Te2O9and Ta2Te2O9: two new mixed oxides of Te(IV)

Authors
Journal
Materials Research Bulletin
0025-5408
Publisher
Elsevier
Publication Date
Volume
22
Issue
4
Identifiers
DOI: 10.1016/0025-5408(87)90257-1

Abstract

Abstract Nb 2Te 2O 9 and Ta 2Te 2O 9 were prepared by solid state reactions between amorphous TeO 3(s) and metallic pentoxides of Nb and Ta. A crystallographic analysis carried out by X-ray diffraction showed that these compounds are isostructural (space group: P2 1/C. a= 6.883 A, b = 7.853 A, c = 14.591 A, β = 103.66 for Nb 2Te 2O 9 and a = 7.10 A, b = 7.48 A, c = 14.62 A, β = 102.9 for Ta 2Te 2O 9). The IR spectra and thermal decomposition processes of both mixed oxides were studied.

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