Crystal structure, spectroscopy, and thermal expansion of compounds in M{sup I}{sub 2}O-Al{sub 2}O{sub 3}-TiO{sub 2} system

• Published in: Journal of solid state chemistry Vol. 196
• Main Authors: Knyazev, A.V., Maczka, M., Ladenkov, I.V., Bulanov, E.N., Ptak, M.
• Format: Journal Article
• Language: English
• Published: United States 15-12-2012
• Subjects: ALUMINIUM OXIDES; CRYSTAL STRUCTURE; CRYSTALS; MATERIALS SCIENCE; SOLIDS; SPECTROSCOPY; THERMAL EXPANSION; TITANIUM OXIDES; X-RAY DIFFRACTION
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/J.JSSC.2012.05.043

Compounds that crystallize in four structure types in M{sub 2}O-Al{sub 2}O{sub 3}-TiO{sub 2} systems have been prepared by solid-phase reactions. LiAlTiO{sub 4}, K{sub 2}Al{sub 2}Ti{sub 6}O{sub 16}, Rb{sub 2}Al{sub 2}Ti{sub 6}O{sub 16} and Cs{sub 2}Al{sub 2}Ti{sub 6}O{sub 16} were synthesized for the first time. Their crystal structures were refined using the Rietveld method. Crystal-chemical systematics was performed for all compounds in M{sub 2}O-Al{sub 2}O{sub 3}-TiO{sub 2} system. Raman and IR investigation have been also made. Thermal expansion coefficients of compounds with the compositions M{sup I}AlTiO{sub 4} (M{sup I}-Li, Cs) and M{sup I}{sub 2}Al{sub 2}Ti{sub 6}O{sub 16} (M{sup I}-Na, K, Rb, Cs) were determined with the use of high-temperature X-ray diffraction analysis. - Graphical abstract: Crystal-chemical systematics of compounds with composition M{sup I}{sub 2}Fe{sub 2}Ti{sub 6}O{sub 16} and M{sup I}FeTiO{sub 4}. Highlights: Black-Right-Pointing-Pointer Compounds in M{sub 2}O-Al{sub 2}O{sub 3}-TiO{sub 2} systems have been prepared by solid-phase reactions. Black-Right-Pointing-Pointer Crystal structures of four compounds were refined using the Rietveld method. Black-Right-Pointing-Pointer Crystal-chemical systematics of compounds in M{sub 2}O-Al{sub 2}O{sub 3}-TiO{sub 2} system was performed. Black-Right-Pointing-Pointer Raman and IR investigation have been made. Black-Right-Pointing-Pointer Thermal expansion coefficients of all compounds were determined.