Perovskite-like limited solid solution in the BaO–Y2O3–CuO–MoO3 system

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Resumo

A new phase Ba2(Y,Cu,Mo)2O6 with the cubic perovskite structure Fm-3m has been obtained in the BaO–CuO–Y2O3–MoO3 quasiquaternary system, and the possibility of coexistence of two limited solid solutions with cubic structures Fm-3m and F-43m has been established. The samples were synthesized by gel combustion followed by calcination at 1000°C and cooling in the inertial thermal regime. The studies were carried out by X-ray phase analysis, X-ray fluorescence spectrometry, infrared spectroscopy, and diffuse reflectance spectroscopy.

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Sobre autores

M. Smirnova

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Autor responsável pela correspondência
Email: smirnova_macha1989@mail.ru
Rússia, 119991, Moscow

M. Kopeva

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: smirnova_macha1989@mail.ru
Rússia, 119991, Moscow

G. Nipan

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: smirnova_macha1989@mail.ru
Rússia, 119991, Moscow

G. Nikiforova

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: smirnova_macha1989@mail.ru
Rússia, 119991, Moscow

A. Yapryntsev

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: smirnova_macha1989@mail.ru
Rússia, 119991, Moscow

A. Archipenko

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: smirnova_macha1989@mail.ru
Rússia, 119991, Moscow

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2. Fig. 1. The concentration tetrahedron of the quasi–four–dimensional BaO–Y2O3-CuO-MoO3 system with the studied compositions.

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3. Fig. 2. X–ray images of samples of the BaO–Y2O3–CuO-MoO3 system: Ba5Y2CuMo2O15 (5212) (1), Ba5Y2Cu2MoO13 (5221) (2), Ba4Y2CuMoO11 (4211) (3), Ba8Y4CuMo3O24 (8413) (4), Ba3YCuMoO8.5 (3111) (5), Ba3YCu2MoO9.5 (3121) (6), Ba4YCuMo2O12.5 (4112) (7), Ba4Y1.8CuMoO10.7 (4(1.8)11) (8).

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4. Fig. 3. IR spectra of sample 5221 (Ba5Y2Cu2MoO13): gel (spectrum 1); amorphous powder before annealing (spectrum 2), after annealing (spectrum 3).

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5. Fig. 4. Absorption spectrum of sample 5221 (Ba5Y2Cu2MoO13) in the UV/visible range.

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