In situ discovery of graphite with interstellar isotopic signatures in a chondrule-free clast in an L3 chondrite

Science

Volumn 280, Issue 5368, 1998, Pages 1418-1420

  Mostefaoui, S ^a   Hoppe, P ^b,c   El Goresy, A ^a  

^a MAX PLANCK INSTITUT FÜR KERNPHYSIK   (Germany)

^b UNIVERSITY OF BERN   (Switzerland)

^c MAX PLANCK INSTITUTE FOR CHEMISTRY   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

GRAPHITE;

CHONDRITE; GRAPHITE;

ANALYTIC METHOD; ARTICLE; ASTRONOMY; CHEMICAL COMPOSITION; OPTICAL RESOLUTION; PRIORITY JOURNAL; SCANNING ELECTRON MICROSCOPY;

EID: 0032577378     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.280.5368.1418     Document Type: Article

References (22)

1. The graphite morphologies include spherulitic, books, cliftonite (polycrystalline aggregate with cubic morphology), and a very fine-grained (<1 μm) type.
2. S. Mostefaoui, E. Zinner, P. Hoppe, A. El Goresy, Lunar Planet. Sci. XXVIII, 989 (1997).
3. S. Mostefaoui, thesis, Muséum National d'Histoire Naturelle Paris (1996).
4. E. Jarosewich, Meteoritics 25, 323 (1990).
5. The birefringence of the graphite can be seen by using crossed nichols in a polarizing reflected light optical microscope.
6. F. Afiattalab and J. T. Wasson, Geochim. Cosmochim. Acta 44, 431 (1980).
7. P. Hoppe et al., ibid. 59, 4029 (1995).
8. SMOW] × 100, where SMOW is the terrestrial standard, standard mean ocean water, and units are parts per thousand.
9. E. Zinner et al., Meteoritics 30, 209 (1995).
10. S. Messenger and R. M. Walker, in Astrophysical Implications of the Laboratory Study of Presolar Materials (American Institute of Physics, Woodbury, NY, 1997), pp. 545-564.
11. J. Geiss and P. Bochsler, Geochim. Cosmochim. Acta 46, 529 (1982).
12. N. G. Adams et al., Astroph. J. 247, L123 (1981).
13. S. S. Prasard and W. T. Huntress Jr., Astrophys. J. Suppl. 43, 1 (1980).
14. _, Astrophys. J. 239, 151 (1980).
15. W. D. Langer and T. E. Graedel, Astrophys. J. Suppl. 69, 241 (1989).
16. T. J. Millar, A. Bennett, E. Herbert, Astrophys. J. 340, 906 (1989).
17. W. Hermsen, T. L. Wilson, C. M. Walmsley, W. Batrla, Astron. Astrophys. 146, 134 (1985).
18. A. G. G. M. Tielens, in Carbon in the Galaxy: Studies from Earth and Space, J. C. Tarter, S. Chang, D. J. Defrees, Eds. (NASA Conf. Publ. 3061, Washington, DC, 1990), pp. 59-111.
19. A. Bischoff and D. Stöffler, Eur. J. Mineral. 4, 707 (1992).
20. D. S. Woolum and D. S. Burnett, Geochim. Cosmochim. Acta 45, 1619 (1981).
21. S. Widge et al., Trans. Met. 8A, 309 (1977).
22. We are grateful to J. Janicke, V. Träumer, C. Wehr, and G. Bonk for technical assistance.