Magnetic susceptibility measurements and electron paramagnetic resonance spectra of samples prepared from the reactive system MnO/Li2CO3 with different starting Li cationic fraction cursive Greek chi are analyzed, taking into account the structural and compositional information provided by x-ray diffraction. Parent phases, as Mn2O3, Mn3O4 and Li2MnO3, arise together with the lithium-manganese spinel as a result of Li-deficiency or Li-excess with respect to the cursive Greek chi = 0.33 composition pertinent to the stoichiometric LiMn2O4 spinel. The data show that the spinel phase can sustain a partial Li-Mn substitution in the cation sites, according to compositional models described, for cursive Greek chi > 0.33, by Li1+yMn3+1-3yMn4+1+2yO4 (Li-rich spinel) and, for cursive Greek chi < 0.33, by Li1-|y|Mn2+|y|Mn3+1+|y|Mn4+1-|y|O4 (Li-poor spinel). Paramagnetic resonance data of the Li-poor spinel phase are analyzed to discuss the possible oxidation state of Mn in the tetrahedral site.

Azzoni, C., Mozzati, M., Paleari, A., Massarotti, V., Bini, M., Capsoni, D. (1998). Evidence of a cationic substitution domain in Lithium-Manganese spinels. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 53(9), 771-778 [10.1515/zna-1998-0907].

Evidence of a cationic substitution domain in Lithium-Manganese spinels

PALEARI, ALBERTO MARIA FELICE;
1998

Abstract

Magnetic susceptibility measurements and electron paramagnetic resonance spectra of samples prepared from the reactive system MnO/Li2CO3 with different starting Li cationic fraction cursive Greek chi are analyzed, taking into account the structural and compositional information provided by x-ray diffraction. Parent phases, as Mn2O3, Mn3O4 and Li2MnO3, arise together with the lithium-manganese spinel as a result of Li-deficiency or Li-excess with respect to the cursive Greek chi = 0.33 composition pertinent to the stoichiometric LiMn2O4 spinel. The data show that the spinel phase can sustain a partial Li-Mn substitution in the cation sites, according to compositional models described, for cursive Greek chi > 0.33, by Li1+yMn3+1-3yMn4+1+2yO4 (Li-rich spinel) and, for cursive Greek chi < 0.33, by Li1-|y|Mn2+|y|Mn3+1+|y|Mn4+1-|y|O4 (Li-poor spinel). Paramagnetic resonance data of the Li-poor spinel phase are analyzed to discuss the possible oxidation state of Mn in the tetrahedral site.
Articolo in rivista - Articolo scientifico
LiMn2O4 Spinel Phase, Magnetic Susceptibility, Electron Paramagnetic Resonance
English
1998
53
9
771
778
none
Azzoni, C., Mozzati, M., Paleari, A., Massarotti, V., Bini, M., Capsoni, D. (1998). Evidence of a cationic substitution domain in Lithium-Manganese spinels. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 53(9), 771-778 [10.1515/zna-1998-0907].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/31578
Citazioni
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 8
Social impact