Influence of Urotropin on the Precipitation of Iron Oxides from FeCl3 ...

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1030 A. ŠARI] ET AL. Figure 8. 57 Mössbauer spectra <strong>of</strong> samples C3, C19 and C29, recorded at room temperature. Figure 9. 57 Mössbauer spectra <strong>of</strong> samples C1, C16 and C26, recorded at room temperature.
PRECIPITATION OF IRON OXIDES 1031 TABLE II 57 Fe Mössbauer parameters <strong>of</strong> selected samples as calculated on the basis <strong>of</strong> the spectra recorded at room temperature Sample Spectral component d mm s –1 D or Eq mm s –1 HMF T G mm s –1 A % C5 Q1 0.37 0.53 0.30 59.6 Q2 0.38 0.95 0.31 40.4 C20 Q 1 0.37 0.52 0.29 57.0 Q 2 0.38 0.95 0.29 43.0 C30 Q 0.31 1.57 24.0 S 1 0.37 0.27 38.6 0.37 68.2 S 2 0.40 0.16 51.9 0.36 7.8 C3 Q 1 0.37 0.51 0.32 52.2 Q 2 0.37 0.91 0.38 47.8 C19 Q 0.28 0.66 0.54 40.6 S 1 0.37 0.27 38.4 0.33 45.5 S 2 0.36 0.11 51.2 0.32 13.9 C29 Q 0.31 1.43 0.45 17.6 S 1 0.37 0.27 38.3 0.38 38.4 S 2 0.37 0.16 50.9 0.37 44.0 C1 Q 0.35 0.66 0.54 60.1 S 1 0.38 0.26 38.0 0.51 10.5 S 2 0.37 0.20 50.8 0.39 29.4 C16 Q 0.34 0.65 0.60 46.8 S1 0.37 0.26 38.3 0.59 12.4 S2 0.37 0.21 51.2 0.43 40.8 C26 Q 0.33 0.66 0.55 48.0 S1 0.37 0.26 37.6 1.16 12.0 S2 0.37 0.20 50.7 0.43 40.0 d = isomer shift given relative to -Fe D = quadrupole splitting <strong>of</strong> doublet Q Eq = quadrupole splitting <strong>of</strong> sextet S HMF = hyperfine magnetic field G = line-width A = area under the peaks. Errors: d, D and Eq = 0.01 mm s –1 , HMF = 0.2 T.
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Influence of Urotropin on the Precipitation of Iron Oxides from FeCl3 ...

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