On the oxidation states of Mn and Fe in polymetallic oxide/oxyhydroxide crusts from the Atlantic Ocean

Identification of newly generated iron phases in recent anoxic sediments: 57Fe Mössbauer and microRaman spectroscopic studies

“…Experimental conditions, sample preparation and instrumental details have been described previously. 35,36 The Mo ssbauer data were analysed by means of computerassisted-least-squares Ðtting procedures. In all cases Lorentzian lineshapes were assumed and the width and areas of the two component peaks in each quadrupole doublet were constrained to be equal.…”

Thermodynamic, spectroscopic and magnetic studies on anoxic sediments from the Seine river estuary

“…Experimental conditions, sample preparation and instrumental details have been described previously. 23,24 The Mo ssbauer data were analyzed by means of computerassisted-least-squares Ðtting procedures. In all cases, Lorentzian lineshapes were assumed and the widths and areas of the two component peaks in each quadrupole doublet were constrained to be equal.…”

“…Instrument details have been described previously.21,22 X-Ray di †raction (XRD) patterns of dried anoxic sediments were obtained on a Philips PW 1730 di †ractometer at a scan speed of 1¡ in 2h min~1 and with a step size of 0.01¡ using Ni-Ðltered Cu-Ka radiation.The scanning electron micrographs of dried anoxic sediments were taken on a CAMBRIDGE 250 MK microscope.Gamma resonance absorption measurements were performed at room temperature using a standard constant acceleration Mo ssbauer spectrometer and a 25 mCi source of 25Co in a Rh matrix. Experimental conditions, sample preparation and instrumental details have been described previously 23,24. The Mo ssbauer data were analyzed by means of computerassisted-least-squares Ðtting procedures.…”