Mild hydrothermal synthesis, crystal structure, thermal behaviour, spectroscopic and magnetic properties of (NH4)0.80Li0.20[Fe(AsO4)F]
| Autor: | Teresa Berrocal, Begoña Bazán, José L. Mesa, María I. Arriortua, José L. Pizarro, Teófilo Rojo, Edurne S. Larrea, Luis Lezama |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
crystal structure
spectroscopy CHEMISTRY PHYSICAL Magnetism ELECTRONIC OPTICAL AND MAGNETIC MATERIALS CHEMISTRY INORGANIC AND NUCLEAR Crystal structure Inorganic Chemistry Octahedral molecular geometry Materials Chemistry Hydrothermal synthesis Antiferromagnetism PHYSICS CONDENSED MATTER Physical and Theoretical Chemistry CERAMICS AND COMPOSITES Chemistry Space group CHEMISTRY MATERIALS Condensed Matter Physics Electronic Optical and Magnetic Materials hydrothermal synthesis Crystallography Octahedron magnetism Ceramics and Composites Orthorhombic crystal system thermal analysis |
| Zdroj: | Addi. Archivo Digital para la Docencia y la Investigación instname |
| ISSN: | 0022-4596 |
| Popis: | postprint The (NH4)0.80Li0.20[Fe(AsO4)F] compound has been synthesized under mild hydrothermal conditions. The compound crystallize in the orthorhombic Pna21 space group, with cell parameters a= 13.352(9), b= 6.7049(9), c= 10.943(2) Å and Z = 8. The compound belongs to the KTiO(PO4) structure type, with chains alternating FeO4F2 octahedra and AsO4 tetrahedra, respectively, running along the “a” and “b” crystallographic axes. The diffuse reflectance spectrum in the visible region shows the forbidden electronic transitions characteristic of the Fe(III) d5-high spin cation in slightly distorted octahedral geometry. The Mössbauer spectrum at room temperature is characteristic of iron (III) cations. The ESR spectra, carried out from room temperature to 20.0 K, remain isotropic with variation in temperature; the g-value being 1.99(1). Magnetic measurements indicate the predominance of strong antiferromagnetic interactions. Ministerio de Ciencia e Innovación, MICINN: MAT-2010-15375. Gobierno Vasco: IT-177.07 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect