IRON CHEMICAL STATE AND STRUCTURAL PROPERTIES OF Fe-Zn MANGANITES AND THEIR CARBONATE PRECURSORS (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• IRON CHEMICAL STATE AND STRUCTURAL PROPERTIES OF Fe-Zn MANGANITES AND THEIR CARBONATE PRECURSORS (Articolo in rivista) (literal)

Anno

• 2003-01-01T00:00:00+01:00 (literal)

Alternative label

• FIIERRO G.; LO JACONO M.; DRAGONE R.; FERRARIS G.; ANDREOZZI G.B.; GRAZIANI G. (2003)
  IRON CHEMICAL STATE AND STRUCTURAL PROPERTIES OF Fe-Zn MANGANITES AND THEIR CARBONATE PRECURSORS
  in Diffusion and defect data, solid state data. Part B, Solid state phenomena
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• FIIERRO G.; LO JACONO M.; DRAGONE R.; FERRARIS G.; ANDREOZZI G.B.; GRAZIANI G. (literal)

Pagina inizio

• 153 (literal)

Pagina fine

• 158 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 90-91 (literal)

Rivista

• Diffusion and defect data, solid state data. Part B, Solid state phenomena (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 6 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• FIIERRO G. [1]; LO JACONO M. [2]; DRAGONE R. [1]; FERRARIS G. [1]; ANDREOZZI G.B. [3]; GRAZIANI G. [3] [1] Consiglio Nazionale delle Ricerche - Istituto 'IMIP' - Sezione di Roma c/o Dipartimento di Chimica - Università di Roma 'SAPIENZA'; [2] Dipartimento di Chimica - Università di Roma 'SAPIENZA'; [3] Dipartimento di Scienze della Terra - Università di Roma 'SAPIENZA' (literal)

Titolo

• IRON CHEMICAL STATE AND STRUCTURAL PROPERTIES OF Fe-Zn MANGANITES AND THEIR CARBONATE PRECURSORS (literal)

Abstract

• Preparation and characterization of both iron-zinc manganites at different iron content (x = Fe/(Fe + Zn) = 0, 0.01, 0.05, 0.10) and their carbonate precursors are reported. In particular, structural properties and the iron chemical state were investigated. Precursors, obtained by coprecipitation at constant pH, were in all cases monophasic and made by a rhodochrosite-like, FexZnyMn(1-x-y)CO3, phase. Mössbauer spectroscopy proved that, surprisingly, Fe3+ was 95% of total iron. A hypothesis about the charge compensation mechanism in the rhodochrosite-like structure is given. The carbonate precursors were decomposed in air at 723 and 973 K, leading at both temperatures to monophasic iron-zinc manganites characterized by a distorted spinel-like structure with tetragonal symmetry. In such a structure, trivalent Mn3+ ions and bivalent Zn2+ ions are perfectly ordered in the octahedral and tetrahedral sites of the crystal lattice, respectively, as expected for a ‘normal’ spinel. Mössbauer investigation revealed that iron is present as trivalent ions in the octahedral sites and that no iron extra-phases were formed. Moreover, three doublets corresponding to octahedral Fe3+ ions were detected, likely related to different distributions of Fe3+/Mn3+ cations in the next-nearest coordination sphere. (literal)

Prodotto di

• Istituto di Nanotecnologia (NANOTEC) (Istituto)

Autore CNR

• GIUSEPPE FIERRO (Unità di personale interno)
• ROBERTO DRAGONE (Persona)
• GIOVANNI FERRARIS (Unità di personale interno)

Incoming links:

Prodotto

• Istituto di Nanotecnologia (NANOTEC) (Istituto)

Autore CNR di

• ROBERTO DRAGONE (Persona)
• GIUSEPPE FIERRO (Unità di personale interno)
• GIOVANNI FERRARIS (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Diffusion and defect data, solid state data. Part B, Solid state phenomena (Rivista)