Rhombic-shaped nanodomains in columbite driven by contrasting cation order (Articolo in rivista)

Type
Label
  • Rhombic-shaped nanodomains in columbite driven by contrasting cation order (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.2138/am.2011.3571 (literal)
Alternative label
  • Tarantino, S. C. [ 1,2 ] ; Zema, M. [ 1,2 ] ; Capitani, G. [ 3 ] ; Scavini, M. [ 4 ] ; Ghigna, P. [ 5 ] ; Brunelli, M. [ 6 ] ; Carpenter, M. A. [ 7 ] (2011)
    Rhombic-shaped nanodomains in columbite driven by contrasting cation order
    in The American mineralogist
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Tarantino, S. C. [ 1,2 ] ; Zema, M. [ 1,2 ] ; Capitani, G. [ 3 ] ; Scavini, M. [ 4 ] ; Ghigna, P. [ 5 ] ; Brunelli, M. [ 6 ] ; Carpenter, M. A. [ 7 ] (literal)
Pagina inizio
  • 374 (literal)
Pagina fine
  • 382 (literal)
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  • ID_PUMA : cnr.igg/2011-A0-075 (literal)
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  • 96 (literal)
Rivista
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  • 2-3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • [ 1 ] Univ Pavia, Dipartimento Sci Terra, I-27100 Pavia, Italy [ 2 ] CNR IGG, Sez Pavia, I-27100 Pavia, Italy [ 3 ] Univ Milano Bicocca, Dipartimento Sci Geol & Geotecnol, I-20100 Milan, Italy [ 4 ] Univ Milan, Dipartimento Chim Fis & Elettrochim, I-20133 Milan, Italy [ 5 ] Univ Pavia, Dipartimento Chim Fis M Rolla, I-27100 Pavia, Italy [ 6 ] European Synchrotron Radiat Facil, F-38000 Grenoble, France [ 7 ] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England (literal)
Titolo
  • Rhombic-shaped nanodomains in columbite driven by contrasting cation order (literal)
Abstract
  • Transient (non-equilibrium) microstructures in crystals may arise in an order-disorder phase transition that generates lattice strain. A two-phase field can develop if fluctuations of the order parameter lead to nucleation of an ordered phase in a disordered matrix, as we describe here for columbite. Synchrotron X-ray diffraction and transmission electron microscopy show that ordering in columbite involves two discrete phases with different degree of order but the same composition. A highly unusual distribution of ordered rhombic-shaped domains within a disordered matrix establishes on a nanometer scale and remains relatively stable over a prolonged period of annealing. Progressive ordering takes place within the ordered domains and the disordered matrix but the domains maintain more or less constant shape and distribution. We speculate that a new family of such microstructures could develop in other oxide phases with cation ordering transitions that are strongly first order in character. Long-term stability of such microstructures and their dependence on strain could open up the possibility of engineering the properties of crystals containing a percolating disordered matrix with ordered nanodomains of controlled dimensions. (literal)
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