SYNTHESIS AND STRUCTURE OF NEW RARE EARTH TANTALATES
Zibrov Igor P., Filonenko Vladimir P., Drobot Dmitrii V., Nikishina Elena E., Lebedeva Elena N.
Pages: 229-239
Published: 1 Jan 2012
Views: 363
Downloads: 43
Abstract: At a pressure of 7.0 GPa and temperature 1100 C new europium and ytterbium tantalates were synthesized. Low hydrated amorphous tantalum, europium and ytterbium hydroxides were used as starting materials. It is shown that tantalates are crystallized in the structure type of F-Ta2O5..RE atoms replace water molecules in the channels of the structure, and tantalum in his positions do not substitute. As well aqueous as anhydrous compounds were obtained. The concentration of Eu and Yb is small and corresponds to the formula Eu0.101Ta2O5.151 and Yb0.067Ta2O5.1. It was found that even such a small amounts of rare-earth cations strongly compress the unit cell of F-Ta2O5.
Keywords: high pressure-high temperature treatment, tantalum pentoxide, low hydrated amorphous tantalum, europium and ytterbium hydroxides, rare-earth tantalate
Cite this article: Zibrov Igor P., Filonenko Vladimir P., Drobot Dmitrii V., Nikishina Elena E., Lebedeva Elena N.. SYNTHESIS AND STRUCTURE OF NEW RARE EARTH TANTALATES. Journal of International Scientific Publications: Materials, Methods & Technologies 6, 229-239 (2012). https://www.scientific-publications.net/en/article/1003172/
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