Plessite formation by discontinuous precipitation reaction from γ-Fe,Ni in Richardton (H5) ordinary chondrite / Grokhovsky V.J., Bevan A.W.R. // Nature. - 1983. - V. 301, l. 5898. - P. 322-324.

ISSN:

00280836

Type:

Article

Abstract:

Discontinuous precipitation reactions involve the growth of stable phases behind a grain boundary migrating into a supersaturated solid-solution 1, and have been synthesized in Fe,Ni alloys at temperatures ≥500°C (ref. 2). Axon and Grokhovsky3 have recently described localized, low temperature (350-400°C) discontinuous precipitation reactions of the type α→[α + γ] (ref. 2) occurring naturally in initially slowly cooled α-Fe,Ni (kamacite) in the Richardton H-group ordinary chondrite. In this further study of the same meteorite we describe a complementary discontinuous precipitation reaction in zoned γ-Fe,Ni (taenite) which has produced plessite (α+ γ-Fe,Ni). Microscopic discontinuous precipitation reactions in Richardton metal occurred at lower temperatures (350°C) and, in the case of zoned γ-taenite, at higher Ni contents than those synthesized in the laboratory2. We suggest that discontinuous precipitation may be an important mechanism for the production of plessite in strained then annealed, or shock reheated, meteorites. © 1983 Nature Publishing Group.

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DOI:

10.1038/301322a0

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https://www.scopus.com/inward/record.uri?eid=2-s2.0-1542323930&doi=10.1038%2f301322a0&partnerID=40&md5=b3faa873d60275f5ea41be5a12c0d79a

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-1542323930&doi=10.1038%2f301322a0&partnerID=40&md5=b3faa873d60275f5ea41be5a12c0d79a
Affiliations	Physico-Technical Department, Urals Polytechnical Institute, Sverdlovsk 620002, Russian Federation; Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD, United Kingdom
References	Williams, D., Butler, E.P., (1981) Int. Metal. Rev, 26, pp. 153-183; Predel, B., Gust, W., (1972) Arch. Bisenhütt, 43, pp. 657-663; Axon, H.J., Grokhovsky, V.J., (1982) Nature, 29, pp. 835-837; Goldstein, J.I., Ogilvie, R.E., (1965) Geochim. Cosmochim. Acta, 29, pp. 893-920; Goldstein, J.I., Axon, H.I., (1973) Naturwissenschaften, 60, pp. 313-321; Wood, J.A., (1964) Icarus, 3, pp. 429-459; Wood, J.A., (1967) Icarus, 6, pp. 1-49; Massalski, T.B., Park, F.R., Vassamillet, L.F., (1966) Geochim. Cosmochim. Acta, 30, pp. 649-662; Lin, L.S., Goldstein, J.I., Williams, D.B., (1979) Geochim. Cosmochim. Acta, 43, pp. 725-737; Buchwald, V.F., (1966) Acta Polytechn. Scand, 51, pp. 1-46; Scott, E.R.D., (1973) Geochim. Cosmochim. Acta, 37, pp. 2283-2294; Romig, A.D., Goldstein, J.I., (1981) Geochim. Cosmochim. Acta, 4 S, pp. 1187-1197; Buchwald, V.F., (1975) Handbook of Iron Meteorites, , (University of California Press, Berkeley; Sears, D.W., Ashworth, J.R., Broadbent, C.P., Bevan, A.W.R., Geochim. Cosmochim. Acta; Taylor, G.J., Heymann, D., (1970) Geochim. Cosmochim. Acta, 34, pp. 677-687; Taylor, G.J., Heymann, D., (1971) J. Geophys. Res, 76, pp. 1879-1893; Fodor, R.V., Keil, K., (1976) Geochim. Cosmochim. Acta, 40, pp. 177-189
Correspondence Address	Grokhovsky, V.J.; Physico-Technical Department, Urals Polytechnical Institute, Sverdlovsk 620002, Russian Federation
Language of Original Document	English
Source	Scopus