Electrical conduction in olivine
Robert N. Schock,
Alfred G. Duba,
Thomas J. Shankland,
Robert N. Schock
Search for more papers by this authorAlfred G. Duba
Search for more papers by this authorThomas J. Shankland
Search for more papers by this author
Robert N. Schock,
Alfred G. Duba,
Thomas J. Shankland,
Robert N. Schock
Search for more papers by this authorAlfred G. Duba
Search for more papers by this authorThomas J. Shankland
Search for more papers by this authorAbstract
This paper reports detailed measurements of electrical conductivity σ and thermoelectric effect S in the mineral olivine and in synthetic forsterite as functions of temperature in the range from 1000° to 1500°C and oxygen partial pressure in the range from 10−10 to 104 Pa. The two most striking observations are strong conductivity anisotropy in forsterite and a sign change in S in olivine at 1390°C. These results are interpreted to show that both materials have mixed ionic and extrinsic electronic conduction under these conditions. On the basis of these interpretations, we infer that forsterite conductivity is dominated by electronic conduction in the a and b directions and probably by movement involving magnesium vacancies in the c direction, where far higher, PO2-independent conductivity is observed. Olivine appears to show mixed conduction under all the circumstances observed; at low temperatures, electron holes dominate but are superseded by magnesium vacancies at high temperatures.
References
- Boland, J. N., A. G. Duba, Defect mechanisms for the solid state reduction of olivine, Point Defects in Minerals, Geophys. Monogr. Ser., 31 R. N. Schock, 211–225, AGU, Washington, D.C., 1985.
10.1029/GM031p0211 Google Scholar
- Boland, J. N., A. G. Duba, An electron microscope study of the stability field and degree of nonstoichiometry in olivine, J. Geophys. Res., 91, 4711–4722, 1986.
- Bradley, R. S., A. K. Jamil, D. C. Munro, The electrical conductivity of olivine at high temperatures and pressures, Geochim. Cosmochim. Acta, 28, 1669–1678, 1964.
- Brook, R. J., Defect structure of ceramic materials, Electrical Conductivity in Ceramics and Glass, Part A N. M. Tallan, 179–267, Marcel Dekker, New York, 1974.
- Buening, D. K., P. R. Buseck, Fe-Mg lattice diffusion in olivine, J. Geophys. Res., 78, 6852–6862, 1973.
- Cemič, L., E. Hinze, G. Will, Messungen der elektrischen Leitfähigkeit bei kontrolliert Sauerstoffaktivitäten in Druckapparaturen mit festen Druckubertragungsmedien, High Temp. High Pressures, 10, 469–472, 1978.
- Clark, A. M., J. V. P. Long, The anisotropic diffusion of nickel in olivine, Diffusion Processes, International Thomas Graham Memorial (Centenary) Symposium J. N. Sherwood, et al., 511–521, Gordon and Breach, New York, 1970.
- Cusack, N., P. Kendall, The absolute scale of thermoelectric power at high temperature, Proc. Phys. Soc. London, 72, 898–901, 1958.
- Duba, A., Electrical conductivity of olivine, J. Geophys. Res., 77, 2483–2495, 1972.
- Duba, A. G., I. A. Nicholls, The influence of oxidation state on the electrical conductivity of olivine, Earth Planet. Sci. Lett., 18, 59–64, 1973.
- Duba, A. G., J. N. Boland, A. E. Ringwood, Electrical conductivity of pyroxene, J. Geol., 81, 727–735, 1973.
- Duba, A., H. C. Heard, R. N. Schock, Electrical conductivity of olivine at high pressure and under controlled oxygen fugacity, J. Geophys. Res., 79, 1667–1673, 1974.
- Gerard, O., B. Houlier, O. Jaoul, F. Abel, Oxygen diffusion in San Carlos olivine, Eos Trans. AGU, 68, 1504, 1987.
- Gourdin, W. H., W. D. Kingery, The defect structure of MgO containing trivalent cation solutes: Shell model calculations, J. Mater. Sci., 14, 2053–2073, 1979.
- Gourdin, W. H., W. D. Kingery, J. Driear, The defect structure of MgO containing trivalent cation solutes: The oxidation-reduction behavior of iron, J. Mater. Sci., 14, 2074–2082, 1979.
- Hermeling, J., H. Schmalzried, Tracer diffusion of the Fe-cation in olivine (FexMg1-x)2SiO4 (III), Phys. Chem. Miner., 11, 161–166, 1984.
- Hobbs, B. E., The influence of metamorphic environment upon the deformation of minerals, Tectonophysics, 78, 335–383, 1981.
- Hobbs, B. E., Constraints on the mechanism of deformation of olivine imposed by defect chemistry, Tectonophysics, 92, 35–69, 1983.
- Hughes, H., The pressure effect on the electrical conductivity of peridot, J. Geophys. Res., 60, 187–191, 1955.
- Jaoul, O., C. Froidevaux, W. B. Durham, M. Michaut, Oxygen self-diffusion in forsterite: Implications for the high temperature creep mechanism, Earth Planet. Sci. Lett., 47, 391–397, 1980.
- Kohlstedt, D. L., P. Hornack, Effect of oxygen partial pressure on the creep of olivine, Anelasticity in the Earth, Geodyn. Ser., 4 F. D. Stacey, M. S. Paterson, A. Nicholas, 101–107, AGU, Washington, D.C., 1981.
10.1029/GD004p0101 Google Scholar
- Kohlstedt, D. L., G. Goetze, W. B. Durham, J. B. Vander Sande, A new technique for decorating dislocations in olivine, Science, 191, 1045–1046, 1976.
- Kroger, F. A., H. V. Vink, Relations between the concentrations of imperfections in crystalline solids, Solid State Phys., 3, 307–435, 1956.
- Lasaga, A. C., Defect calculations in silicates: Olivine, Am. Mineral., 65, 1237–1248, 1980.
- Linker, M. F., S. H. Kirby, A. Ord, J. M. Christie, Effects of compression direction on the plasticity and rheology of hydrolytically weakened synthetic quartz crystals at atmospheric pressure, J. Geophys. Res., 89, 4241–4255, 1984.
- Mackwell, S. J., D. Dimos, D. L. Kohlstedt, Transient creep of olivine: Point defect relaxation times, Philos. Mag., 57A, 779–789, 1988.
- Morin, F. J., J. R. Oliver, R. M. Housley, Electrical properties of forsterite, Mg2SiO 4, Phys. Rev. B, 16, 4434–4445, 1977.
- Morin, F. J., J. R. Oliver, R. M. Housley, Electrical properties of Mg2SiO4, II, Phys. Rev. B, 19, 2886–2894, 1979.
- Nakamura, A., H. Schmalzried, On the nonstoichiometry and point defects of olivine, Phys. Chem. Miner., 10, 27–37, 1983.
- Netherton, R., A. Duba, An apparatus for simultaneously measuring electrical conductivity and oxygen fugacityRep. UCRL-52394Lawrence Livermore Natl. Lab., Livermore, Calif., 1978.
- Nitsan, U., Stability field of olivine with respect to oxidation and reduction, J. Geophys. Res., 79, 706–711, 1974.
- Nitsan, U., T. J. Shankland, Optical properties and electronic structure of mantle silicates, Geophys. J. R. Astron. Soc., 45, 59–87, 1976.
- O'Keeffe, M., B. G. Hyde, On Si-O-Si configurations in silicates, Acta Crystallogr. Sect. B, 34, 27–32, 1978.
- O'Keeffe, M., B. G. Hyde, The role of nonbonded forces in crystals, Structure and Bonding in Crystals, , VI, 227–253, Academic, San Diego, Calif., 1981.
10.1016/B978-0-12-525101-3.50016-4 Google Scholar
- Osburn, C. M., R. W. Vest, Electrical properties of single crystals, bicrystals, and polycrystals of MgO, J. Am. Ceram. Soc., 54, 428–435, 1971.
- Parkin, T., The electrical conductivity of synthetic forsterite and periclase, Ph.D. thesis,Univ. of Newcastle upon Tyne,England,1972.
- Paterson, M. S., K. R. S. S. Kekulawala, The role of water in quartz deformation, Bull. Mineral., 102, 92–98, 1979.
- Pluschkell, W., H. J. Engell, Ionen- und elektronenleitung im Magnesiumorthosilikat, Ber. Dtsch. Keram. Ges., 45, 388–394, 1968.
- Ryerson, F. J., W. B. Durham, D. Cherniak, W. A. Lanford, Oxygen diffusion in olivine, Eos Trans. AGU, 68, 417, 1987.
- Sato, H., High temperature a.c. electrical properties of olivine single crystal with varying oxygen partial pressure: Implications for the point defect chemistry, Phys. Earth Planet. Inter., 41, 269–282, 1986.
- Schirmer, O. F., P. Koidl, H. G. Reik, Bound small polaron optical absorption in V—type centres in MgO, Phys. Status Solidi B, 62, 385–391, 1974.
- Schmalzried, H., Electrical conduction in magnesium oxide, J. Chem. Phys., 33, 940, 1960.
- Schock, R. N., A. G. Duba, Point defects and the mechanisms of electrical conduction in olivine, Point Defects in Minerals, Geophys. Monogr. Ser., 31 R. N. Schock, 88–96, AGU, Washington, D.C., 1985.
10.1029/GM031p0088 Google Scholar
- Schock, R. N., A. G. Duba, H. C. Heard, H. D. Stromberg, The electrical conductivity of polycrystalline olivine and pyroxene under pressure, High Pressure Research: Applications in Geophysics M. Manghnani, S. Akimoto, 39–51, Academic, San Diego, Calif., 1977.
10.1016/B978-0-12-468750-9.50009-7 Google Scholar
- Schock, R. N., A. G. Duba, T. J. Shankland, Mechanisms of electrical conductivity in olivine, Mineralogiya, 10, 139–148, 1984.
- Sempolinski, D. R., W. D. Kingery, Ionic conductivity and magnesium vacancy mobility in magnesium oxide, J. Am. Ceram. Soc., 63, 664–669, 1980.
- Sempolinksi, D. R., W. D. Kingery, H. L. Tuller, Electronic conductivity of single crystalline magnesium oxide, J. Am. Ceram. Soc., 63, 669–675, 1980.
- Shankland, T. J., Band gap of forsterite, Science, 161, 51–53, 1968.
- Shankland, T. J., Electrical conduction in rocks and minerals: Parameters for interpretation, Phys. Earth Planet. Inter., 10, 209–219, 1975.
- Smyth, D. M., R. L. Stocker, Point defects and nonstoichiometry in forsterite, Phys. Earth Planet. Inter., 10, 183–192, 1975.
- Stocker, R. L., Influence of oxygen pressure on defect concentrations in olivine with a fixed cationic ratio, Phys. Earth Planet. Inter., 17, 118–129, 1978.
- Takei, H., T. Kobayashi, Growth and properties of Mg2SiO4 single crystals, J. Crystal Growth, 23, 121–124, 1974.
- Tozer, D. C., The electrical properties of the earth's interior, Phys. Chem. Earth, 3, 414–436, 1959.
- Tuller, H. L., Mixed conduction in non-stoichiometric oxides, Nonstoichiometric Oxides O. Toft Sorensen, 271–337, Academic, San Diego, Calif., 1981.
10.1016/B978-0-12-655280-5.50011-0 Google Scholar
- Tuller, H. L., Electrical conduction in ceramics: Toward improved defect interpretation, Point Defects in Minerals, Geophys. Monogr. Ser., 31 R. N. Schock, 47–68, AGU, Washington, D.C., 1985.
10.1029/GM031p0047 Google Scholar
- Wimmer, J. M., I. Bransky, Electronic conduction, Electrical Conductivity in Ceramics and Glass, Part A N. M. Tallan, 269–311, Marcel Dekker, New York, 1974.
