High-pressure iron-sulfur compound, Fe3S2, and melting relations in the Fe-FeS system

Science

Volumn 275, Issue 5306, 1997, Pages 1621-1623

  Fei, Yingwei ^a   Bertka, Constance M ^a   Finger, Larry W ^a  

^a GEOPHYSICAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALLOY; IRON; SULFUR;

ARTICLE; ASTRONOMY; CORE TEMPERATURE; DATA ANALYSIS; GEOLOGY; HYPERBARISM; PRIORITY JOURNAL;

CORE TEMPERATURE; IRON/SULPHUR COMPOUND; MELTING RELATIONS; METEORITE; PARENT BODY; PLANETARY CORE;

EID: 0030896969     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.275.5306.1621     Document Type: Article

References (23)

1. F. Birch, J. Geophys. Res. 69, 4377 (1964); B. Mason, Nature 211, 616 (1966); V. R. Murthy and H. T. Hall, Phys. Earth Planet. Inter. 2, 276 (1970); J. M. Brown, T. J. Ahrens, D. L. Shampine, J. Geophys. Res. 89, 6041 (1984); H. Wänke and G. Dreibus, Philos. Trans. R. Soc. London Ser. A 235, 545 (1988); Q. Williams and R. Jeanloz, J. Geophys. Res. 95, 19299 (1990); R. Boehler, Earth Planet. Sci. Lett. 111, 217 (1992).
2. F. Birch, J. Geophys. Res. 69, 4377 (1964); B. Mason, Nature 211, 616 (1966); V. R. Murthy and H. T. Hall, Phys. Earth Planet. Inter. 2, 276 (1970); J. M. Brown, T. J. Ahrens, D. L. Shampine, J. Geophys. Res. 89, 6041 (1984); H. Wänke and G. Dreibus, Philos. Trans. R. Soc. London Ser. A 235, 545 (1988); Q. Williams and R. Jeanloz, J. Geophys. Res. 95, 19299 (1990); R. Boehler, Earth Planet. Sci. Lett. 111, 217 (1992).
3. F. Birch, J. Geophys. Res. 69, 4377 (1964); B. Mason, Nature 211, 616 (1966); V. R. Murthy and H. T. Hall, Phys. Earth Planet. Inter. 2, 276 (1970); J. M. Brown, T. J. Ahrens, D. L. Shampine, J. Geophys. Res. 89, 6041 (1984); H. Wänke and G. Dreibus, Philos. Trans. R. Soc. London Ser. A 235, 545 (1988); Q. Williams and R. Jeanloz, J. Geophys. Res. 95, 19299 (1990); R. Boehler, Earth Planet. Sci. Lett. 111, 217 (1992).
4. F. Birch, J. Geophys. Res. 69, 4377 (1964); B. Mason, Nature 211, 616 (1966); V. R. Murthy and H. T. Hall, Phys. Earth Planet. Inter. 2, 276 (1970); J. M. Brown, T. J. Ahrens, D. L. Shampine, J. Geophys. Res. 89, 6041 (1984); H. Wänke and G. Dreibus, Philos. Trans. R. Soc. London Ser. A 235, 545 (1988); Q. Williams and R. Jeanloz, J. Geophys. Res. 95, 19299 (1990); R. Boehler, Earth Planet. Sci. Lett. 111, 217 (1992).
5. F. Birch, J. Geophys. Res. 69, 4377 (1964); B. Mason, Nature 211, 616 (1966); V. R. Murthy and H. T. Hall, Phys. Earth Planet. Inter. 2, 276 (1970); J. M. Brown, T. J. Ahrens, D. L. Shampine, J. Geophys. Res. 89, 6041 (1984); H. Wänke and G. Dreibus, Philos. Trans. R. Soc. London Ser. A 235, 545 (1988); Q. Williams and R. Jeanloz, J. Geophys. Res. 95, 19299 (1990); R. Boehler, Earth Planet. Sci. Lett. 111, 217 (1992).
6. F. Birch, J. Geophys. Res. 69, 4377 (1964); B. Mason, Nature 211, 616 (1966); V. R. Murthy and H. T. Hall, Phys. Earth Planet. Inter. 2, 276 (1970); J. M. Brown, T. J. Ahrens, D. L. Shampine, J. Geophys. Res. 89, 6041 (1984); H. Wänke and G. Dreibus, Philos. Trans. R. Soc. London Ser. A 235, 545 (1988); Q. Williams and R. Jeanloz, J. Geophys. Res. 95, 19299 (1990); R. Boehler, Earth Planet. Sci. Lett. 111, 217 (1992).
7. F. Birch, J. Geophys. Res. 69, 4377 (1964); B. Mason, Nature 211, 616 (1966); V. R. Murthy and H. T. Hall, Phys. Earth Planet. Inter. 2, 276 (1970); J. M. Brown, T. J. Ahrens, D. L. Shampine, J. Geophys. Res. 89, 6041 (1984); H. Wänke and G. Dreibus, Philos. Trans. R. Soc. London Ser. A 235, 545 (1988); Q. Williams and R. Jeanloz, J. Geophys. Res. 95, 19299 (1990); R. Boehler, Earth Planet. Sci. Lett. 111, 217 (1992).
8. T. M. Usselman, Am. J. Sci. 275, 278 (1975).
9. R. Brett and P. M. Bell, Earth Planet. Sci. Lett. 6, 479 (1969).
10. B. Ryzhenko and G. C. Kennedy, Am. J. Sci. 273, 803 (1973).
11. M. Hansen and K. Anderko, Constitution of Binary Alloys (McGraw-Hill, New York, 1958), p. 704.
12. Experimental techniques were described by C. M. Bertka and Y. Fei (J. Geophys. Res., in press). The starting materials, Fe-FeS mixtures, were synthesized in evacuated, sealed silica glass tubes at 800°C. The starting materials were then loaded in a MgO-platinum or a MgO-rhenium double-capsule. Experiments below 3 GPa were conducted in a piston-cylinder apparatus. At higher pressures, melting experiments were carried out in a multi-anvil apparatus. The apparatus has been calibrated up to a pressure of 25 GPa for a 10-mm-edged octahedron and 3-mm TEL (truncation edge length) assembly at both room temperature and 1200°C. The 3-mm assembly consisted of a rhenium heater with a lanthanum chromite sleeve serving as a thermal insulator. Temperatures were measured with a W26%Re-W5%Re thermocouple whose hot junction was in direct contact with the sample container. The eutectic temperature was bracketed by a series of quenched experiments carried out at different temperatures.
13. 2 stoichiometric composition.
14. Powder x-ray diffraction data were collected at beam line X7A of the National Synchrotron Light Source of Brookhaven National Laboratory, using the high-resolution mode with a Si(111) channel-cut monochromator and a Ge(110) analyzer crystal at 0.79826(2) Å. See D. E. Cox, B. H. Toby, M. M. Eddy [Aust. J. Phys. 41, 117 (1988)] for details of the instrument. The wavelength and diffractometer zero were calibrated with Si powder. Program GSAS [ A. C. Larson and R. B. Von Dreele, Report LA-UR 86-748 (Los Alamos National Laboratory, Los Alamos, NM, 1986)] was used for all profile fitting. A modified version of TREOR90 [P.-E. Werner, L. Eriksson, M. J. Westdahl, J. Appl. Crystallogr. 18, 367 (1985)] was used to determine the unit-cell parameters for the unknown phases. For the method of intensity extraction, see A. Le Bail, H. Duray, J. L. Fourquet [Mater. Res. Bull. 23, 447 (1988)]. The intensity values do not imply any knowledge of the crystal structures of these phases.
15. Powder x-ray diffraction data were collected at beam line X7A of the National Synchrotron Light Source of Brookhaven National Laboratory, using the high-resolution mode with a Si(111) channel-cut monochromator and a Ge(110) analyzer crystal at 0.79826(2) Å. See D. E. Cox, B. H. Toby, M. M. Eddy [Aust. J. Phys. 41, 117 (1988)] for details of the instrument. The wavelength and diffractometer zero were calibrated with Si powder. Program GSAS [ A. C. Larson and R. B. Von Dreele, Report LA-UR 86-748 (Los Alamos National Laboratory, Los Alamos, NM, 1986)] was used for all profile fitting. A modified version of TREOR90 [P.-E. Werner, L. Eriksson, M. J. Westdahl, J. Appl. Crystallogr. 18, 367 (1985)] was used to determine the unit-cell parameters for the unknown phases. For the method of intensity extraction, see A. Le Bail, H. Duray, J. L. Fourquet [Mater. Res. Bull. 23, 447 (1988)]. The intensity values do not imply any knowledge of the crystal structures of these phases.
16. Powder x-ray diffraction data were collected at beam line X7A of the National Synchrotron Light Source of Brookhaven National Laboratory, using the high-resolution mode with a Si(111) channel-cut monochromator and a Ge(110) analyzer crystal at 0.79826(2) Å. See D. E. Cox, B. H. Toby, M. M. Eddy [Aust. J. Phys. 41, 117 (1988)] for details of the instrument. The wavelength and diffractometer zero were calibrated with Si powder. Program GSAS [ A. C. Larson and R. B. Von Dreele, Report LA-UR 86-748 (Los Alamos National Laboratory, Los Alamos, NM, 1986)] was used for all profile fitting. A modified version of TREOR90 [P.-E. Werner, L. Eriksson, M. J. Westdahl, J. Appl. Crystallogr. 18, 367 (1985)] was used to determine the unit-cell parameters for the unknown phases. For the method of intensity extraction, see A. Le Bail, H. Duray, J. L. Fourquet [Mater. Res. Bull. 23, 447 (1988)]. The intensity values do not imply any knowledge of the crystal structures of these phases.
17. Powder x-ray diffraction data were collected at beam line X7A of the National Synchrotron Light Source of Brookhaven National Laboratory, using the high-resolution mode with a Si(111) channel-cut monochromator and a Ge(110) analyzer crystal at 0.79826(2) Å. See D. E. Cox, B. H. Toby, M. M. Eddy [Aust. J. Phys. 41, 117 (1988)] for details of the instrument. The wavelength and diffractometer zero were calibrated with Si powder. Program GSAS [ A. C. Larson and R. B. Von Dreele, Report LA-UR 86-748 (Los Alamos National Laboratory, Los Alamos, NM, 1986)] was used for all profile fitting. A modified version of TREOR90 [P.-E. Werner, L. Eriksson, M. J. Westdahl, J. Appl. Crystallogr. 18, 367 (1985)] was used to determine the unit-cell parameters for the unknown phases. For the method of intensity extraction, see A. Le Bail, H. Duray, J. L. Fourquet [Mater. Res. Bull. 23, 447 (1988)]. The intensity values do not imply any knowledge of the crystal structures of these phases.
18. G. Kullerud and R. A. Yund, J. Petrol. 3, 126 (1962); M. E. Fleet, An. Mineral. 62, 341 (1977); J. B. Parise, Acta Crystallogr. B 36, 1179 (1980).
19. G. Kullerud and R. A. Yund, J. Petrol. 3, 126 (1962); M. E. Fleet, An. Mineral. 62, 341 (1977); J. B. Parise, Acta Crystallogr. B 36, 1179 (1980).
20. G. Kullerud and R. A. Yund, J. Petrol. 3, 126 (1962); M. E. Fleet, An. Mineral. 62, 341 (1977); J. B. Parise, Acta Crystallogr. B 36, 1179 (1980).
21. Y. Fei, C. T. Prewitt, H.-k. Mao, C. M. Bertka, Science 268, 1892 (1995).
22. D. M. Sherman, Earth Planet. Sci. Lett. 132, 87 (1995).
23. We thank A. Campbell for carrying out some of the experiments at P < 12 GPa. Supported by the NASA Planetary Materials and Geochemistry Program (NAGW-3942), the NSF Center for High Pressure Research, and the Carnegie Institution of Washington.