Optical and vibrational spectra of Bi1.8Fe1.2(1 – x)Ga1.2x SbO7 solid solutions with pyrochlore-type structure

Optical and vibrational spectra of Bi1.8Fe1.2(1 – x)Ga1.2x SbO7 solid solutions with pyrochlore-type structure

Optical and vibrational spectra of Bi1.8Fe1.2(1 – x)Ga1.2xSbO7 solid solutions with pyrochlore structure have been studied. It has been shown that the compounds have strongly disordered structure. It has been established that a decrease in iron content causes a marked shift of Bi1.8Fe1.2(1 – x)Ga1.2...

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Veröffentlicht in:Russian journal of inorganic chemistry 2017-07, Vol.62 (7), p.960-963
Hauptverfasser: Egorysheva, A. V., Milenov, T. I., Rafailov, P. M., Gaitko, O. M., Avdeev, G. V., Dudkina, T. D.
Format: Artikel
Sprache:eng
Schlagworte:
Inorganic chemistry
Iron
Solid solutions
Vibrational spectra
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Zusammenfassung:Optical and vibrational spectra of Bi1.8Fe1.2(1 – x)Ga1.2xSbO7 solid solutions with pyrochlore structure have been studied. It has been shown that the compounds have strongly disordered structure. It has been established that a decrease in iron content causes a marked shift of Bi1.8Fe1.2(1 – x)Ga1.2xSbO7 absorption edge. According to assessment of band gap width, Bi1.8Ga1.2SbO7 is the most wide-band compound (2.90 eV), while Bi1.8Fe1.2SbO7 is the most narrow-band compound (1.88 eV).
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023617070063