Premium
Lanthanum Phosphite Microspheres: Hydrothermal Synthesis, Ab Initio Structure Determination, Morphology and Photoluminescence of La(HO)(HPO 3 )
Author(s) -
Xiong DingBang,
Zhao YuFeng,
Gulay Lubomir D.,
Zhao JingTai
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900425
Subject(s) - chemistry , hydrothermal circulation , lanthanum , hydrothermal synthesis , crystallography , ab initio , photoluminescence , crystal structure , oxalate , ab initio quantum chemistry methods , phase (matter) , diffraction , rod , nanotechnology , chemical engineering , inorganic chemistry , materials science , organic chemistry , molecule , optics , physics , optoelectronics , engineering , medicine , alternative medicine , pathology
Abstract Lanthanum phosphite microspheres with diameters of 80–100 μm were obtained under hydrothermal conditions by using lanthanum oxalate as precursor. The surfaces of these spherules consist of well‐orientated submicron‐sized rods with typical diameters of 300 nm and lengths of 6 μm. The possible mechanism of formation of this morphology was suggested. The product is a new phase, and its crystal structure was determined by ab initio methods from high‐resolution conventional X‐ray powder diffraction analysis. Chains consisting of face‐sharing LaO 9 polyhedra were observed; these chains form three‐dimensional compact frameworks by sharing vertexes in the ab plane and edges along the c axis. The sample doped with Ce 3+ showed an intensive broad emission band with a maximum around 364 nm under UV excitation.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)