Abstract
The electrical resistivity of polycrystalline graphite and amorphous carbon are measured at high pressures and room temperature. The results show that the resistivity of these carbon phases decreases with increasing pressure below 19 GPa. The pressure dependence of the resistivity (dlnϱ/dP) is determined to be-0.037 GPa−1 for the polycrystalline graphite and-0.039 GPa−1 for the amorphous carbon. A phase transition, interpreted as the transformation to hexagonal diamond phase, is observed in the polycrystalline graphite at about 20 GPa but not in the amorphous carbon. The present experimental results support the assumption that this phase transition is martensitic in nature.
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References
Aust RB, Drickamer HG (1963) Carbon: a new crystalline phase. Science 140:817–819
Bundy FP, Kasper JS (1967) Hexagonal diamond — a new form of carbon. J Chem Phys 46:3437–3446
Duba AG, Shankland TJ (1982) Free carbon & electrical conductivity in the Earth's mantle. Geophys Res Lett 9:1271–1274
Frondel C, Marvin UB (1967) Lonsdaleite, a hexagonal polymorph of diamond. Nature 214:587–589
Gwanmesia GD, Liebermann RC (1992) Polycrystals of high-pressure phases of mantle minerals: hot-pressing and characterization of physical properties. In: Syono Y, Manghnani MH (eds) High-Pressure Research: Application to Earth and Planetary Sciences. Terra Scientific Publishing, Tokyo, pp 117–135
Hanfland M, Beister H, Syassen K (1989) Graphite under pressure: equation of state and first-order Raman modes. Phys Rev B 39:12598–12603
Hanneman RE, Strong HM, Bundy FP (1967) Hexagonal diamond in meteorites: implications. Science 155:995–997
Li X, Jeanloz R (1987) Electrical conductivity of (Mg,Fe)SiO3 perovskite and a perovskite-dominated assemblage at lower mantle conditions. Geophys Res Lett 14:1075–1078
Li X, Jeanloz R (1990) Laboratory studies of the electrical conductivity of silicate perovskites at high pressures and temperatures. J Geophys Res B 95:5067–5078
Liebermann RC, Wang Y (1992) Characterization of sample environment in a uniaxial splitsphere apparatus. In: Syono Y, Manghnani MH (eds) High-Pressure Research: Application to Earth and Planetary Sciences. Terra Scientific Publishing, Tokyo, pp 19–31
Lonsdale K (1971) Formation of Lonsdaleite from single-crystal graphite. Am Mineral 56:333–336
Mao HK, Bell PM (1977) Techniques of electrical conductivity measurement to 300 kbar. In: Manghnani MH, Akimoto S (eds) High-Pressure Research: Application in Geophysics. Academic, New York, pp 493–502
Mattey DP (1987) Carbon isotopes in the mantle. Terra Cognita 7:31–37
Spain IL (1973) Electronic transport properties of graphite, carbons, and related materials. In: Walker PL, Thrower PA (eds) Chemistry and Physics of Carbon, vol 8. Marcel Dekker, New York, pp 1–150
Tingle TN, Green HW (1987) Carbon solubility in olivine: implications for upper mantle evolution. Geology 15:324–326
Utsumi W, Yagi T (1991) Light-transparent phase formed by room-temperature compression of graphite. Science 252:1542–1544
Weast RC, Astle MJ (1980) CRC Handbook of Chemistry and Physics. CRC Press, Boca Raton, pp F171
Yagi T, Utsumi W, Yamakata M, Kikegawa T, Shimomura O (1992) High-pressure in situ x-ray-diffraction study of the phase transformation from graphite to hexagonal diamond at room temperature. Phys Rev B 46:6031–6039
Zhao YX, Spain IL (1989) X-ray diffraction data for graphite to 20 GPa. Phys Rev B 40:993–997
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Li, X., Mao, HK. Solid carbon at high pressure: Electrical resistivity and phase transition. Phys Chem Minerals 21, 1–5 (1994). https://doi.org/10.1007/BF00205208
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DOI: https://doi.org/10.1007/BF00205208