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The equilibrium boundary between graphite and diamond

1976; American Geophysical Union; Volume: 81; Issue: 14 Linguagem: Inglês

10.1029/jb081i014p02467

2156-2202

C. Scott Kennedy, George C. Kennedy,

Thermal properties of materials

Journal of Geophysical Research (1896-1977)Volume 81, Issue 14 p. 2467-2470 Physical Properties of Rocks The equilibrium boundary between graphite and diamond C. Scott Kennedy, C. Scott KennedySearch for more papers by this authorGeorge C. Kennedy, George C. KennedySearch for more papers by this author C. Scott Kennedy, C. Scott KennedySearch for more papers by this authorGeorge C. Kennedy, George C. KennedySearch for more papers by this author First published: 10 May 1976 https://doi.org/10.1029/JB081i014p02467Citations: 541AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract The equilibrium boundary between diamond and graphite has been determined over the temperature interval 1100°C–1625°C. A piston-cylinder apparatus and a ‘zero-friction’ cell were used. Pressures were computed by force/area measurements and are independent of any calibration points. Visual observations of diamond dissolution or diamond growth were used in fixing the position of the boundary. Our newly determined boundary has the equation P(kbar) = 19.4 + T(°C)/40 kbar. Corrections for the effect of pressure on the emf of thermocouples have been made. Our newly determined boundary is almost coincident with the 1961 boundary published by the General Electric Company (Bundy et al., 1961) References Bundy, F. P., Melting point of graphite at high pressure: Heat of fusion, Science, 1373535, 1055–1057, 1962a. Bundy, F. P., Direct conversion of graphite to diamond in static pressure apparatus, Science, 1373535, 1057–1058, 1962b. Bundy, F. P., Melting of graphite at very high pressure, J. Chem. Phys., 383, 618–630, 1963a. Bundy, F. P., Direct conversion of graphite to diamond in static pressure apparatus, J. Chem. Phys., 383, 631–643, 1963b. Bundy, F. P., Behavior of carbon at very high pressures and temperatures, Kon. Ned. Akad. Wetensch. Proc. Ser. B, 725, 302–316, 1969. Bundy, F. P., J. S. Kasper, Hexagonal diamond—A new form of carbon, J. Chem. Phys., 469, 3437–3446, 1967. Bundy, F. P., H. P. Bovenkerk, H. M. Strong, R. H. Wentorf Jr., Diamond-graphite equilibrium line from growth and graphitization of diamond, J. Chem. Phys., 352, 383–391, 1961. Bundy, F. P., H. M. Strong, R. H. Wentorf Jr., Methods and mechanisms of synthetic diamond growth, Chem. Phys. Carbon, 10, 213–262, 1973. Getting, I. C., G. C. Kennedy, Effect of pressure on the emf of chromel-alumel and platinum-platinum 10% rhodium thermocouples, J. Appl. Phys., 4111, 4552–4562, 1970. Kennedy, G. C., B. E. Nordlie, The genesis of diamond deposits, Econ. Geol., 635, 495–503, 1968. Meyer, H. O. A., F. R. Boyd, Composition and origin of crystalline inclusions in natural diamond, Geochim. Cosmochim. Acta, 36, 1255–1273, 1972. Mirwald, P. W., I. C. Getting, G. C. Kennedy, Low-friction cell for piston-cylinder high-pressure apparatus, J. Geophys. Res., 8011, 1519–1525, 1975. Strong, H. M., The growth of diamond: Small and large, commercial and noncommercialTech. Inform. Ser. Rep. 72CRD174, 1–8Corp. Res. and Develop., Gen. Elec. Co., Schenectady, N. Y., 1972. Strong, H. M., R. M. Chrenko, Further studies on diamond growth rates and physical properties of laboratory-made diamond, J. Phys. Chem., 75, 1838–1843, 1971. Strong, H. M., R. E. Hanneman, Crystallization of diamond and graphite, J. Chem. Phys., 469, 3668–3676, 1967. Wentorf Jr., R. H., Solutions of carbon at high pressure, Ber. Bunsenges. Phys. Chem., 709/10, 975–982, 1966. Citing Literature Volume81, Issue14Solid Earth and Planets10 May 1976Pages 2467-2470 ReferencesRelatedInformation