The coexistence of LiMn2O4and Li2MnO3phases from MnO/Li2CO3mixtures with lithium cationic fraction 0.33≤x≤0.53 was studied by X-ray diffraction (XRD) and electron paramagnetic resonance (EPR) measurements. XRD quantitative phase analysis was carried out using the Rietveld profile refinement procedure, while the Li2MnO3percentage was determined directly by comparing the EPR intensities with the intensity of the pure Li2MnO3spectrum. The experimental results show the presence of an Li-rich spinel phase and allow an estimation of the lithium excess, since the structural analysis of pure Li2MnO3samples evidenced a nearly stoichiometric composition (x=0.663) with very limited cationic disorder. © 1997 Academic Press.
Massarotti, V., Capsoni, D., Bini, M., Azzoni, C., Paleari, A. (1997). Stoichiometry of Li2MnO3 and LiMn2O4 coexisting phases: XRD and EPR characterization. JOURNAL OF SOLID STATE CHEMISTRY, 128(1), 80-86 [10.1006/jssc.1996.7158].
Stoichiometry of Li2MnO3 and LiMn2O4 coexisting phases: XRD and EPR characterization
PALEARI, ALBERTO MARIA FELICE
1997
Abstract
The coexistence of LiMn2O4and Li2MnO3phases from MnO/Li2CO3mixtures with lithium cationic fraction 0.33≤x≤0.53 was studied by X-ray diffraction (XRD) and electron paramagnetic resonance (EPR) measurements. XRD quantitative phase analysis was carried out using the Rietveld profile refinement procedure, while the Li2MnO3percentage was determined directly by comparing the EPR intensities with the intensity of the pure Li2MnO3spectrum. The experimental results show the presence of an Li-rich spinel phase and allow an estimation of the lithium excess, since the structural analysis of pure Li2MnO3samples evidenced a nearly stoichiometric composition (x=0.663) with very limited cationic disorder. © 1997 Academic Press.
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