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Título: | Hydrothermal synthesis, crystal structure, thermal behaviour and magnetic properties of a new ammonium-chromium-iron(III) bis(hydrogenphosphate) |
Autor: | Iglesias, Isabel; Alfonso, Belén F.; Trobajo, Camino CSIC ORCID; Huidobro, José A.; Amghouz, Zakariae CSIC ORCID; Martínez-Blanco, David; Blanco, Jesús A. CSIC ORCID; García, José R. CSIC ORCID | Palabras clave: | Metal phosphates Hydrothermal synthesis Crystal structures Thermal decomposition Kinetics Magnetic properties |
Fecha de publicación: | 2019 | Editor: | Elsevier | Citación: | Journal of Solid State Chemistry 269: 72-79 (2019) | Resumen: | The hydrothermal synthesis and the chemical-physical characterization of an ammonium-chromium(III)-iron(III) bis(hydrogenphosphate), Cr0.34Fe0.66NH4(HPO4)2 [CrFeNP] is reported. It was obtained in aqueous media by reaction between chromium(III) chloride, iron(III) chloride, urea, and orthophosphoric acid. The crystal structure of CrFeNP was determined from single-crystal X-ray diffraction data. It crystallizes in the triclinic system, space group P-1, and exhibits two types of different infinite tunnels along [0 1 0] and [1 0 0] directions, where the ammonium cations are located. Thermal analysis shows that the solid is stable up to ca. 600 K. The activation energy of the thermal decomposition up to 1273 K was computed by isoconversional methods. In addition, the magnetic behaviour of the material was investigated from magnetic susceptibility and magnetization measurements. CrFeNP undergoes two successive magnetic transitions at temperatures Tc = 17. 9 K and Tt = 3.1 K, which could be related to a ferri- and an antiferromagnetic magnetic phase transitions, respectively. | Versión del editor: | https://doi.org/10.1016/j.jssc.2018.09.015 | URI: | http://hdl.handle.net/10261/210829 | DOI: | 10.1016/j.jssc.2018.09.015 | Identificadores: | doi: 10.1016/j.jssc.2018.09.015 issn: 0022-4596 |
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