@article{a1967264e01f463fa5783c51d3baee4c,
title = "Determination of the magnetite-water equilibrium oxygen isotope fractionation factor at 350°C: A comparison of ion microprobe and laser fluorination techniques",
abstract = "A Cameca 4f ion microprobe has been used in conjunction with laser and conventional analytical techniques to measure the oxygen isotope fractionation between magnetite and water at 350°C. A set of experiments in which large (10-200 μm) magnetite crystals were grown from fine grained (0.2-2 μm) hematite starting material using four different isotopically labelled waters yields a value of 1000 In α(mt-w) = -8.47 ± 0.23, as determined by bulk oxygen extraction using laser fluorination. The value from the ion microprobe determination based on replicate analysis of magnetite single crystals is -8.60 ± 0.65. The bulk analysis of one of the set of four experiments was used as an internal ion microprobe standard. The good agreement between the two techniques suggests that ion microprobe analyses may permit determination of isotope fractionation factors in experiments involving only a few percent of overall exchange.",
author = "Fortier, {Steven M.} and Cole, {David R.} and Wesolowski, {David J.} and Riciputi, {Lee R.} and Paterson, {Bruce A.} and Valley, {John W.} and Juske Horita",
note = "Funding Information: Acknowledgments--This study was supported by the Geosciences Program of the Office of Basic Energy Research, U.S. Department of Energy, under contract AC05-84OR21400 with Lockheed Martin Energy Systems, Inc., grant #DE-FG02-93ER 14389 to JWV, and the ORNL Laboratory Directed Research and Development Program. SMF and BAP were also sponsored by ORAU/ORISE. Helpful reviews of the manuscript were provided by I. Hutcheon and an anonymous reviewer. Thanks are due to D. Joyce (ORNL) for acetate analyses, T. Labotka (UTK) for access to the XRD facility, D. Coffey (ORNL) for excellent SEM work, N. Kitchen (UW) for stable isotope analysis by laser fluorination, and M. Gillispie (ORNL) for photography.",
year = "1995",
month = sep,
doi = "10.1016/0016-7037(95)00309-N",
language = "English",
volume = "59",
pages = "3871--3875",
journal = "Geochimica et Cosmochimica Acta",
issn = "0016-7037",
number = "18",
}