Formation of Metal−Anion Arrays within Layered Perovskite Hosts. Preparation of a Series of New Metastable Transition-Metal Oxyhalides, (MCl)LaNb2O7 (M = Cr, Mn, Fe, Co)

Autor:	Weilie L. Zhou, John B. Wiley, Julien Koenig, Thomas A. Kodenkandath, Gabriel Caruntu, Liliana Viciu, Nicolas Royant
Rok vydání:	2002
Předmět:	Chemistry Inorganic Chemistry Metal chemistry.chemical_compound Crystallography Metal halides Differential scanning calorimetry Transition metal visual_art visual_art.visual_art_medium Physical and Theoretical Chemistry Isostructural Thermal analysis Powder diffraction Perovskite (structure)
Zdroj:	Inorganic Chemistry. 41:3385-3388
ISSN:	1520-510X 0020-1669
DOI:	10.1021/ic020026m
Popis:	A new series of transition-metal oxyhalides (MCl)LaNb(2)O(7) (M = Cr, Mn, Fe, Co) have been prepared by a simple topochemical route. Layered perovskite hosts (ALaNb(2)O(7), A = Li, Na, K or Rb) were reacted with the corresponding anhydrous metal halides under mild reaction conditions (400 degrees C). The compounds were examined by X-ray powder diffraction; the series appears to be isostructural with (CuCl)LaNb(2)O(7), and the layer spacings, with the exception of M = Co, follow the trend expected from transition-metal cationic radii. Thermal analysis with differential scanning calorimetry (DSC) shows the materials to be metastable where all four compounds decompose exothermically above 690 degrees C.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c9296977d4c723ab91802378c59c738 https://doi.org/10.1021/ic020026m Zobrazit plný text záznamu