Synthesis and thermal decomposition of mixed Gd-Nd oxalates

• Published in: Journal of thermal analysis and calorimetry Vol. 91; no. 3; pp. 797 - 803
• Main Authors: Ubaldini, A., Artini, C., Costa, G. A., Carnasciali, M. M., Masini, R.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.03.2008; Springer
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Exact sciences and technology; Inorganic Chemistry; Inorganic chemistry and origins of life; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Preparations and properties; Salts; oxalates; TG/DTA analysis; rare earths; Scanning electron microscopy; Pyrolysis; Gadolinium Oxalate; Thermogravimetry; Differential thermal analysis; Dispersive spectrometry; Surface structure; Energy dispersion; Morphology; Neodymium Oxalate; Raman spectrometry; Thermal analysis; Lanthanide Compounds; Chemical synthesis
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-007-8503-z

Several (Gd 1−x Nd x ) 2 [C 2 O 4 ] 3 · n H 2 O samples (0≤ x ≤1) were prepared by a coprecipitation method: the precipitation is quantitative and all the samples are homogeneous in stoichiometry. XRD analyses have shown that a complete solid solution is formed over the whole range of compositions. The dried Gd rich oxalates have initially a low water content which gradually increases with the Nd content. All the oxalates decompose in O 2 around 700°C either into a single mixed oxide or in a mixture of oxides through several steps, which can be ascribed to the loss of water and CO 2 .