The synthesis of mixed Gd-Nd oxycarbonates was performed via a solid state route involving the decomposition of mixed oxalates. Depending on the reaction atmosphere, the compounds can form through two different reaction paths: by partial decomposition of the corresponding mixed oxalates or by complete decomposition of the oxalates followed by partial carbonation. All the oxycarbonates, when prepared at 600 °C in static air or CO2, form a solid solution, crystallize in the hexagonal structure and follow Vegard's law. If treated at lower temperature, Nd oxalate gives rise to the monoclinic structure, so that the monoclinic → hexagonal phase transition can be observed. The decomposition of the oxycarbonates leads to the cubic form of the corresponding oxide for each composition. © 2008 Elsevier B.V. All rights reserved.

Synthesis and phase equilibria of Nd-Gd mixed oxycarbonates

ARTINI, CRISTINA
2009-01-01

Abstract

The synthesis of mixed Gd-Nd oxycarbonates was performed via a solid state route involving the decomposition of mixed oxalates. Depending on the reaction atmosphere, the compounds can form through two different reaction paths: by partial decomposition of the corresponding mixed oxalates or by complete decomposition of the oxalates followed by partial carbonation. All the oxycarbonates, when prepared at 600 °C in static air or CO2, form a solid solution, crystallize in the hexagonal structure and follow Vegard's law. If treated at lower temperature, Nd oxalate gives rise to the monoclinic structure, so that the monoclinic → hexagonal phase transition can be observed. The decomposition of the oxycarbonates leads to the cubic form of the corresponding oxide for each composition. © 2008 Elsevier B.V. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/867159
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