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Electron paramagnetic resonance study of dry cements
Measured X-range Electron Paramagnetic Resonance (EPR) spectra of dry cements are showing that the configuration of iron ions is mainly in Fe(3+) oxidation state is distorted octahedral and purely tetragonal symmetry of the surrounding ligands. This is reflected in the deformation of the sextet spectra of Mn(2+) ions (g-factor value of 2.0018, simulated as g(perpendicular)=g(parallel)=2.0018, A(perpendicular)=A(parallel)=8.8 mT, pp=1.0 mT) by the addition of parallel component of the EPR spectrum of Fe(3+) ion. All spectra were measured at the temperature of 293 K.
Electron paramagnetic resonance study of dry cements
Measured X-range Electron Paramagnetic Resonance (EPR) spectra of dry cements are showing that the configuration of iron ions is mainly in Fe(3+) oxidation state is distorted octahedral and purely tetragonal symmetry of the surrounding ligands. This is reflected in the deformation of the sextet spectra of Mn(2+) ions (g-factor value of 2.0018, simulated as g(perpendicular)=g(parallel)=2.0018, A(perpendicular)=A(parallel)=8.8 mT, pp=1.0 mT) by the addition of parallel component of the EPR spectrum of Fe(3+) ion. All spectra were measured at the temperature of 293 K.
Electron paramagnetic resonance study of dry cements
Elektronenspinresonanz-Studie von trockenen Zementen
Lapcik, L. jun. (author) / Simek, Z. (author)
Cement and Concrete Research ; 26 ; 237-242
1996
6 Seiten, 3 Bilder, 1 Tabelle, 6 Quellen
Article (Journal)
English
Portlandzement , Trocknen , Probenpräparation , paramagnetische Resonanz , Mörtel , Bestandteil , Mangan , Eisen , Ion , Oxidationsbeständigkeit , Koordination , Elektronenkonfiguration , Umgebungstemperatur , oktaedrische Koordination , Eisenoxid , Aluminiumoxid , Calciumoxid , Magnesiumoxid , chemische Zusammensetzung , Zement , Erstarrung , Kinetik , Mechanismus
Electron Paramagnetic Resonance Study of Dry Cements
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