Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/121165
Título: Pressure-induced structural transformations of the Zintl phase sodium silicide
Autores/as: Quesada Cabrera, Raúl 
Salamat, Ashkan
Barkalov, Oleg I.
Leynaud, Olivier
Hutchins, Peter
Daisenberger, Dominik
Machon, Denis
Sella, Andrea
Lewis, Dewi W.
McMillan, Paul F.
Clasificación UNESCO: 220406 Fenómenos de alta presión
230117 Espectroscopia Ramn
221104 Cristalografía
Palabras clave: Sodium silicide
Zintl phase
High-pressure transition
Synchrotron X-ray diffraction
Pressure-induced amorphisation, et al.
Fecha de publicación: 2009
Publicación seriada: Journal of Solid State Chemistry 
Resumen: The high-pressure behaviour of NaSi has been studied using Raman spectroscopy and angle-dispersive synchrotron X-ray diffraction to observe the onset of structural phase transformations and potential oligomerisation into anionic Si nanoclusters with extended dimensionality. Our studies reveal a first structural transformation occurring at 8-10 GPa, followed by irreversible amorphisation above 15 GPa, suggesting the formation of Si-Si bonds with oxidation of the Si- species and reduction of Na+ to metallic sodium. We have combined our experimental studies with DFT calculations to assist in the analysis of the structural behaviour of NaSi at high pressure. © 2009 Elsevier Inc. All rights reserved.
URI: http://hdl.handle.net/10553/121165
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2009.06.037
Fuente: Journal of Solid State Chemistry [ISSN 0022-4596], v. 182(9), p. 2535-2542
Colección:Artículos
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