Modulated Structure of La1/3−xLi3xNbO3 0≤x≤0.06 Perovskite-Related Materials

• Published in: Journal of solid state chemistry Vol. 148; no. 1; pp. 93 - 99
• Main Authors: García-Martín, S., Alario-Franco, M.Á.
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 15.11.1999; Elsevier
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Inorganic compounds; lithium conductors; microdomains; modulated structure; niobates; perovskite; Physics; Salts; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; microdomains; perovskite; niobates; modulated structure; lithium conductors; Inorganic compounds; Vacancies; Lithium Metaniobates; Electron diffraction; Modulated materials; Niobates; Perovskites; Rare earth compounds; Experimental study; Order disorder; High-resolution methods; Solid solutions; Lanthanum Metaniobates; Chemical composition; Microstructure; TEM; Crystal structure
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1006/jssc.1999.8377

The microstructure of samples of different composition belonging to the cation-deficient La1/3−xLi3xNbO3, 0≤x≤0.06, solid solution has been studied by selected area electron diffraction and high resolution transmission electron microscopy. The materials show a perovskite-related structure with basic lattice parameters a∼√2ap, b∼√2ap, c∼2ap. Besides, short-range cation ordering gives place to a larger unit cell of dimensions a∼3.5√2ap, b∼√2ap, c∼4ap. The lithium-containing compunds also present a complex microdomain structure of the octahedra tilting framework.