HYPERACOUSTIC PROPERTIES AND LOCAL-STRUCTURE IN HYDRATED MOLTEN-SALTS (Articolo in rivista)

Type
Label
  • HYPERACOUSTIC PROPERTIES AND LOCAL-STRUCTURE IN HYDRATED MOLTEN-SALTS (Articolo in rivista) (literal)
Anno
  • 1991-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1080/00268979100100421 (literal)
Alternative label
  • MAISANO, G and MAJOLINO, D and MIGLIARDO, P and VENUTO, S and ALIOTTA, F and MAGAZU, S and VASI, C (1991)
    HYPERACOUSTIC PROPERTIES AND LOCAL-STRUCTURE IN HYDRATED MOLTEN-SALTS
    in Molecular physics (Print); TAYLOR & FRANCIS LTD, London (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • MAISANO, G and MAJOLINO, D and MIGLIARDO, P and VENUTO, S and ALIOTTA, F and MAGAZU, S and VASI, C (literal)
Pagina inizio
  • 549 (literal)
Pagina fine
  • 557 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 72 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • MAISANO, G (Reprint Author), UNIV MESSINA,DIPARTIMENTO FIS,CONTRADA PAPARDO,POB 55,I-98166 ST AGATA,ITALY. CNR,IST TECN SPETTROSCOPICHE,I-98166 ST AGATA,ITALY. UNIV MESSINA,CNR,CTR INT SCI MECAN,GRP NAZL STRUTTURA MAT,I-98166 ST AGATA,ITALY. (literal)
Titolo
  • HYPERACOUSTIC PROPERTIES AND LOCAL-STRUCTURE IN HYDRATED MOLTEN-SALTS (literal)
Abstract
  • Polarized Mandelstam-Brillouin scattering data in molten Ca(NO3)2 . 4.17 H2O and in its mixture with K(NO3) are presented. The measurements are performed in the deeply supercooled region. Hypersonic velocity and absorption exhibit a relaxational phenomenon to which both the structural and shear mechanisms contribute. The dynamic responses of these hydrated molten salts are interpreted in terms of existing viscoelastic models. The mean relaxation time tau-r and the relaxation modulus M(r) have non-Arrhenius behaviour, supporting that this class of glass-forming liquids can be viewed as `fragile' liquids. In addition the local order around the cations is determined by means of EXAFS measurements carried out at the PULS facility. The EXAFS data give evidence of the existence of inner shell water complexation for the cations Ca2+ and K+ that leads to a close-packed structure in which the H2O molecules are shared among the ions. (literal)
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