Crystal structure, spectroscopy, and thermal expansion of compounds in MI2O–Al2O3–TiO2 system

• Published in: Journal of solid state chemistry Vol. 196; pp. 110 - 118
• Main Authors: Knyazev, A.V., Mączka, M., Ladenkov, I.V., Bulanov, E.N., Ptak, M.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01-12-2012
• Subjects: Infrared; Raman; Structure refinement; Thermal expansion; Thermal expansion; Raman; Infrared; Structure refinement
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2012.05.043

Compounds that crystallize in four structure types in M2O–Al2O3–TiO2 systems have been prepared by solid-phase reactions. LiAlTiO4, K2Al2Ti6O16, Rb2Al2Ti6O16 and Cs2Al2Ti6O16 were synthesized for the first time. Their crystal structures were refined using the Rietveld method. Crystal–chemical systematics was performed for all compounds in M2O–Al2O3–TiO2 system. Raman and IR investigation have been also made. Thermal expansion coefficients of compounds with the compositions MIAlTiO4 (MI–Li, Cs) and MI2Al2Ti6O16 (MI–Na, K, Rb, Cs) were determined with the use of high-temperature X-ray diffraction analysis.
Crystal–chemical systematics of compounds with composition MI2Fe2Ti6O16 and MIFeTiO4. [Display omitted]
► Compounds in M2O–Al2O3–TiO2 systems have been prepared by solid-phase reactions. ► Crystal structures of four compounds were refined using the Rietveld method. ► Crystal–chemical systematics of compounds in M2O–Al2O3–TiO2 system was performed. ► Raman and IR investigation have been made. ► Thermal expansion coefficients of all compounds were determined.