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Iron isotopes

Fig. 5-2. An absorptiometer with a radioactive isotope as an x-ray source. The iron isotope in a button is mounted at the left of the instrument. (Courtesy of Hughes and Wilezewski, Anal. Chem., 26, 1889.)... Fig. 5-2. An absorptiometer with a radioactive isotope as an x-ray source. The iron isotope in a button is mounted at the left of the instrument. (Courtesy of Hughes and Wilezewski, Anal. Chem., 26, 1889.)...
C22-0050. The iron isotope with 33 neutrons is used in medical applications. It is a P emitter. A sample of iron containing 1.33 picograms (pico = 10 ) of this isotope registers 242 decays per second. [Pg.1615]

T. Walczyk. Iron Isotope Ratio Measurements by Negative Thermal Ionisation Mass Spectrometry using FeF Molecular Ions. Int. J. Mass Spectrom. Ion Proc., 161(1997) 217-227. [Pg.71]

Zhu XK, O Nions RK, Guo Y, Reynolds BC (2000) Secular variation of iron isotopes in north Atlantic Deep Water. Science 287 2000-2002. [Pg.24]

Kehm K, Hauri EH, Alexander CMOD, Carlson RW (2003) High precision iron isotope measurements of meteoritic material by cold plasma ICP-MS. Geochim Cosmochim Acta 67 2879-2891... [Pg.59]

Virag A, Zinner E, Lewis RS, Tang M (1989) Isotopic compositions of H, C, and N in C8 diamonds from the Allende and Murray carbonaceous chondrites. Lunar Planet Sci XX 1158-1159 Volkening J, Papanastassiou DA (1989) Iron isotope anomalies. Astrophys J 347 L43-L46 Volkening J, Papanastassiou DA (1990) Zinc isotope anomalies. Astrophys J 358 L29-L32 Wadhwa M, Zinner EK, Crozaz G (1997) Manganese-chromium systematics in sulfides of unequilibrated enstatite chondrites. Meteorit Planet Sci 32 281-292... [Pg.63]

Anbar AD, Jarzecki A, Spiro T (in press) Theoretical investigation of iron isotope fractionation between Fe(H20)6 and Fe(H20)6. Geochim Cosmochim Acta... [Pg.97]

Bottinga Y (1968) Calculations of fractionation factors for carbon and oxygen isotope exchange in the system calcite-carbon dioxide-water. J Phys Chem 72 800-808 Bullen TD, White AF, Childs CW, Vivit DV, Schulz MS (2001) Demonstration of significant abiotic iron isotope fractionation in nature. Geology 29 699-702... [Pg.98]

Patel A, Price GD, Mendelssohn MJ (1991) A computer simulation approach to modeling the structure, thermodynamics and oxygen isotope equilibria of silicates. Phys Chem Min 17 690-699 Polyakov VB (1997) Equilibrium fractionation of the iron isotopes estimation from Mossbauer spectroscopy data. Geochim Cosmochim Acta 61 4213-4217... [Pg.100]

Beard BL, Johnson CM (1999) High precision iron isotope measurements of terrestrial and lunar materials. Geochim Cosmochim Acta 63 1653-1660... [Pg.147]

Dixon PR, Perrin RE, Rokop DJ, Maeck R, Janecky DR, Banar JP (1993) Measurements of iron isotopes ( Fe, 56Fe, sspe) in sub microgram quantities of iron. Anal Chem 65 2125-2130... [Pg.148]

Taylor PDF, Maeck R, De Bievre P (1992) Determination of the absolute isotopic composition and Atomic Weight of a reference sample of natural iron. Int J Mass Spectrom Ion Processes 121 111-125 Taylor PDF, Maeck R, Hendrickx F, De Bievre P (1993) The gravimetric preparation of synthetic mixtures of iron isotopes. Int J Mass Spectrom Ion Processes 128 91-97 Thirlwall MF (2002) Multicollector ICP-MS analysis of Pb isotopes using a Pb- Pb double spike demonstrates up to 4000 ppm/amu systematic errors in Tl-normalization. Chem Geol 184 255-279... [Pg.149]

WaIczyk T (1997) Iron isotope ratio measurements by negative thermal ionization mass spectrometry using FeF4" molecular ions. Int J Mass Spectrom Ion Proc 161 217-227... [Pg.150]

Alexander CMOD, Grossman JN, Wang J, Zanda B, Bourot-Denise M, Hewins RH (2000) The lack of potassium-isotopic fractionation in Bishunpur chondrules. Meteor Planet Sci 35 859-868 Alexander CMOD, Wang J (2001) Iron isotopes in chondrules implications for the role of evaporation during chondrule formation. Meteor Planet Sci 36 419-428... [Pg.229]

Anbar AD, Roe JE, Holman ES, Barling J, Nealson KH (2000) Non-biological fractionation of iron isotopes. Science 288 126-128... [Pg.314]

Iron isotope data in the literature have been reported in both standard 5 notation (parts per 10 ), and s notation (parts per lO ), and workers have reported data in terms of Te/ Fe, Te/ Fe, or Fe/ Fe ratios. The low abundance of Fe limits its usefulness in describing mass-dependent variations, although Fe may be important for evaluating non-mass dependent effects (e.g., Volkening and Papanastassiou 1989). In standard per mil notation, the 5 Fe and 5 Te values are most commonly defined as ... [Pg.321]

Mass-dependent iron isotope fractionation between two phases, A and B, is noted as... [Pg.323]

IRON ISOTOPE VARIATIONS IN HIGH TEMPERATURE ENVIRONMENTS... [Pg.336]

Figure 18. Temporal variations in Fe and Pb isotope composition for layers in Fe-Mn crust BM1969.05 from the Blake Plateau, Atlantic Ocean. Iron isotope data from Zhu et al. (2000) and Pb isotope data and ages from O Nions et al. (1998) and Reynolds et al. (1999). Modified from Zhu et al. (2000). Figure 18. Temporal variations in Fe and Pb isotope composition for layers in Fe-Mn crust BM1969.05 from the Blake Plateau, Atlantic Ocean. Iron isotope data from Zhu et al. (2000) and Pb isotope data and ages from O Nions et al. (1998) and Reynolds et al. (1999). Modified from Zhu et al. (2000).
Alexander CMO D, Wang J (2001) Iron isotope in chondrules implications for the role of evaporation during chondrule formation. Meteoritics Planet Sci 36 419-428... [Pg.353]

Beard BL, Johnson CM (2004) Inter-mineral Fe isotope variations in mantle derived rocks and implications for the Fe geochemical cycle. Geochim Cosmochim Acta, in press Beard BL, Johnson CM, Cox L, Sun H, Nealson KH, Aguiliar C (1999) Iron isotope biosignatures. Science 285 1889-1892... [Pg.354]

Bergquist B, Boyle E (2002) Iron isotopic composition of Amazon River. EOS Trans. Am Geophys Union 83 OS12C-0290... [Pg.354]

Criss RE (1999) Principles of stable isotope distribution. Oxford Univ Press, New York Croal LR, Johnson CM, Beard BL, Newman DK (2004) Iron isotope fractionation by anoxygenic Fe(II)-phototrophic bacteria. Geochim Cosmochim Acta in press Duce RA, Tindale NW (1991) Atmospheric transport of iron and its deposition in the ocean. Limnol... [Pg.354]

Matthews A, Morgans-Bell HS, Emmanuel S, Jenkyns HC, Erel Y, Halicz L (2004) Controls on iron-isotope fractionation in organic-rich sediments. Geochim Cosmochim Acta, in press Millero FJ, Yao W, Aicher J (1995) The speciation of Fe(II) and Fe(III) in natural waters. Marine Chemistry 50 21-39... [Pg.356]

Mullane E, Russel SS, Gounelle M (2002) Iron isotope fractionation within a differentiated asteroidial sample suite. 65 Annual Meteoritical Society Meeting, abstract number 5157 Mullane E, Russel SS, Gounelle M, Mason TED (2003a) Iron isotope composition of Allende and Chainpur chondrules effects of equilibration and thermal history. Lunar Planet Sci Conf XXXIV, abstract number 1027... [Pg.356]

See other pages where Iron isotopes is mentioned: [Pg.1615]    [Pg.123]    [Pg.11]    [Pg.23]    [Pg.90]    [Pg.109]    [Pg.147]    [Pg.147]    [Pg.148]    [Pg.323]    [Pg.323]    [Pg.338]    [Pg.343]    [Pg.344]    [Pg.346]    [Pg.348]    [Pg.351]    [Pg.354]    [Pg.355]    [Pg.355]   
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