English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/113061
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 2 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Thermal synthesis and structural characterization of the orthorhombic Th2(PO4)(P3O10)

Autor García-Glez, Jorge; Alfonso, Belén F.; Huidobro, José A.; Khainakov, Sergei ; Castro, Germán R. ; Trobajo, Camino
Palabras clave Structure
Thorium phosphate-triphosphate
Thermal decomposition
Fecha de publicación 2014
EditorSpringer
Citación Journal of Thermal Analysis and Calorimetry 118(2): 759-765 (2014)
ResumenPolycrystalline thorium(IV) phosphate-triphosphate, Th2(PO4)(P3O10) (1), was obtained by (NH4)2Th(PO4)2·H2O (2) heating from room temperature to 1,273 K. 1 crystallizes in the orthorhombic space group Pn21 a (a = 11.6846(2) Å, b = 7.1746(1) Å, c = 12.9320(3) Å, Z = 4). Combining powder synchrotron X-ray diffraction data and DFT geometry optimization, a structural model is proposed for 1. The structure is built on ThO8 polyhedral chains along the b-axis. PO4 3− and P3O10 5− groups coexist in the structure and the latter group forms non-linear chains. Cohesion of the structure is made by the linkage of ThO8 chains by PO4 and P3O10 groups. Thermal transformation from 2 to 1 was monitored by thermogravimetric analysis (activation energy as a function of the extent of conversion was obtained from Kissinger–Akahira–Sunose (KAS) isoconversional method) and powder X-ray thermo-diffraction. For 2, the dehydration process takes place in two steps, with the apparition of a layered intermediate phase, (NH4)2Th(PO4)2·nH2O (0 < n < 1, d = 6.42 Å), previously to the formation of (NH4)2Th(PO4)2 (d = 6.31 Å). The condensation process produces an amorphous material that crystallizes to α-ThP2O7 (3) when the temperature increases. At 1,273 K, 3 slowly transforms to 1.
URI http://hdl.handle.net/10261/113061
DOI10.1007/s10973-014-3922-0
Identificadoresdoi: 10.1007/s10973-014-3922-0
issn: 1388-6150
e-issn: 1572-8943
Aparece en las colecciones: (CINN) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.