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Experimental assessment of the extent of orientational short-range order in liquids

AutorPardo, L.C.; Veglio, N.; Bermejo, Francisco Javier ; Tamarit, J.Ll.; Cuello, G. J.
Fecha de publicación25-jul-2005
EditorAmerican Physical Society
CitaciónPhysical Review B - Condensed Matter and Materials Physics 72: 014206 (2005)
ResumenThe spatial extent of orientational short-range order in liquid and rotationally disordered phases of two halogen-substituted methanes are examined by means of neutron diffraction. The pair distribution functions measured within the liquids are compared to those corresponding to the rotator-phase crytals where the separation between orientational and positional correlations is enabled by the presence of time-averaged fcc lattices. The two condensed systems under scrutiny comprise a material devoid (CCl4) and another [C(CD3)3Cl] having a relatively strong molecular dipole moment. Our results show orientational correlations to be confined below the second coordination sphere. Furthermore, contrary to what could be expected, angular correlations within the nonpolar material are of comparable strength to those present within the polar C(CD3)3Cl. © 2005 The American Physical Society.
Descripción8 págs.; 11 figs. ; PACS number s : 61.43. j, 61.20. p, 61.72. y
Versión del editorhttps://doi.org/10.1103/PhysRevB.72.014206
URIhttp://hdl.handle.net/10261/140286
DOI10.1103/PhysRevB.72.014206
Identificadoresdoi: 10.1103/PhysRevB.72.014206
issn: 1098-0121
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