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  • 1. Andersson, Per S.
    et al.
    Porcelli, D.
    Gustafsson, Ö.
    Ingri, Johan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Wasserburg, G.J.
    Colloid and particle transport of U isotopes in the low salinity zone of a stable estuary1998In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 62A, p. 57-58Article in journal (Refereed)
  • 2.
    Cabri, Louis J.
    et al.
    Cabri Consulting Inc, Ottawa, Canada.
    Aiglsperger, Thomas
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    A review of hexaferrum based on new mineralogical data2018In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 82, no 3, p. 531-538Article in journal (Refereed)
    Abstract [en]

    Hexaferrum, defined as an hcp Fe mineral containing varying amounts of Ru, Os, or Ir(Mochalov et al. 1998) was re-examined in the light of new analyses of similar alloys from the Loma Peguera and Loma Larga chromitites, in the central part of Loma Caribe peridotite, Cordillera Central of the Dominican Republic, together with a review of the phase chemistry inthe Fe-Ni-Ir and Fe-Ru-Ir systems. We conclude that the hcp (Fe,Ir) mineral corresponds to theε-phase of Raub et al. (1964) and should be differentiated from hexaferrum [(Fe,Os) and(Fe,Ru)] because it is separated by one to two miscibility gaps and therefore is not a continuous solid solution with Fe.

  • 3.
    Clayton, R.E
    et al.
    Research School of Earth Sciences, UCL-Birkbeck, Gower St., London.
    Hudson-Edwards, K.A.
    Research School of Earth Sciences, UCL-Birkbeck, Gower St., London.
    Malinovskiy, Dmitry
    Andersson, P.
    Laboratory for Isotope Geology. Swedish Museum of Natural History, Stockholm.
    Fe isotope fractionation during the precipitation of ferrihydrite and transformation of ferrihydrite to goethite2005In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 69, no 5, p. 667-676Article in journal (Refereed)
    Abstract [en]

    Ferrihydrite and goethite are amongst the most important substrates for the sorption of contaminants in soil and other environmental media. Isotopic studies of the transition elements, particularly those that exhibit more than one oxidation state and show pH- and/or redox-sensitive behaviour at low temperatures, have been shown to be potentially useful present-day and past proxies for redox (or palaeoredox) conditions. We have made preliminary investigations of Fe isotope fractionation that take place during the formation of FeIII (oxy)hydroxides (FeIIIox) from an aqueous FeIII(NO3)3 solution (FeIIIaq) under laboratory conditions. We have attempted to keep the chemical system simple by excluding 'vital effects' and major changes in redox through the maintenance of abiotic conditions and use of FeIIIaq. Isotopic measurements (56Fe/54Fe, 57Fe/54Fe) of the FeIII(NO3)3 stock solution, the original ferrihydrite and the mixed ferrihydrite/goethite-supernatant FeIIIaq 'pairs' were carried out using a double focusing multicollector inductively coupled plasma mass spectrometer. The results reveal an apparent systematic variation indicating larger ΔFeIIIaq-FeIIIox with decrease in the ferrihydrite:goethite ratio, which reflects the time allowed for isotopic exchange. These values range from virtually zero (0.03‰) after 24 h to 0.30‰ after 70 h. In each FeIIIox-FeIIIaq 'pair' the lighter Fe isotope is partitioned into the FeIIIox, leaving the FeIIIaq isotopically heavier. The observed fractionation reflects isotopic exchange of Fe between the FeIIIox and FeIIIaq upon at least a two step transition of ferrihydrite to goethite.

  • 4. Gustafsson, Ö.
    et al.
    Andersson, Per
    Widerlund, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Ingri, Johan
    Roos, P.
    Colloid-particle dynamics and element transport through the low-salinity zone of a stable boreal northern shield estuary: insights from short-lived 234Th and sampling with high salinity resolution1998In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 62A, p. 553-554Article in journal (Refereed)
  • 5.
    Ingri, Johan
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Torssander, P.
    Andersson, Per
    Mörth, C-M
    Hydrogeochemistry of sulphur isotopes in the Kalix river catchment, northern Sweden1994In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 58A, no 1, p. 442-443Article in journal (Other academic)
  • 6.
    Ingri, Johan
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Widerlund, Anders
    Land, Magnus
    Öhlander, Björn
    Andersson, P.S.
    Gustafsson, Ö.
    Seasonal variations of the rare earth elements in a boreal river1998In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 62A, p. 681-682Article in journal (Other academic)
  • 7. Land, Magnus
    et al.
    Ingri, Johan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Andersson, P.S.
    Öhlander, Björn
    Tracing subsurface water flowpaths by means of dissolved Ba/Sr, Ca/Sr and 87Sr/86Sr ratios1998In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 62A, p. 850-851Article in journal (Other academic)
  • 8.
    Rodríguez, Nathalie Pérez
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Adlassnig, Wolfram
    Core Facility Cell Imaging and Ultrastructure Research, Univeristy of Vienna.
    Rodushkin, Ilya
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Alakangas, Lena
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Öhlander, Björn
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Isotopic fractionation of Cu in biofilms from a historic mining site2013In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 77, no 5, p. 1950-Article in journal (Refereed)
  • 9.
    Öhlander, Björn
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Ingri, Johan
    Land, Magnus
    Andersson, P.S.
    Schönberg, H.
    Fractionation of Sm-Nd isotopes during weathering of till1998In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 62A, p. 1104-1105Article in journal (Other academic)
1 - 9 of 9
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