Dion L. Heinz
Dion Heinz
Associate Professor, Department of the Geophysical Sciences, James Franck Institute, and the College
Phone: 773/702-3046
E-mail: heinz at uchicago.edu
Office: HGS 541
Note: new web-page link is here:
http://geosci.uchicago.edu/~heinz
Research:
My main areas of interest are mineral physics and materials research. Mineral physics is the study of the chemical and physical properties of minerals applied to problems in the evolution and dynamics of planetary bodies. We use the diamond anvil cell to study simple materials as well as minerals at high pressures. The pressures that we can achieve are in excess of 100GPa or one million atmospheres which corresponds to 2,500 km depth in the Earth. By using a laser to heat the samples we can reach temperatures of 6000 K while the samples are at high pressures. These types of experiments allow us to perform a wide variety of petrologic experiments at lower mantle pressures and temperatures. For instance we measure solid-solid and solid-liquid phase transformations as a function of temperature and pressure, as well as major and minor element partitioning between coexisting phases.
Diamonds are transparent to a wide range of electromagnetic radiation, which makes them a very good window material for a wide variety of spectroscopic techniques. In particular we are interested in infrared, Raman and Brillouin spectroscopy on Earth materials, since the vibrational spectroscopy can place important constraints on the thermodynamic properties of these materials. Brillouin scattering is used to measure elastic constants of materials at high pressures. Synchrotron radiation is used to measure equations of state of materials as a function of temperature and pressure. One of our future goals is to combine our laser heating technology with synchrotron radiation to make in situ measurements that are appropriate for the Earth's deep interior.
Recent Publications
Seagle C. T., Heinz D. L., Campbell A. J., Prakapenka V. and Wanless S. T. Melting and thermal expansion in the Fe - FeO system at high pressure, Earth Planet. Sci. Lett., 265, 655-665, 2007.
Campbell A. J., Seagle C. T., Heinz D. L., Shen G. and Prakapenka V. Partial melting in the iron-sulfur system at high pressure: A synchrotron X-ray diffraction study. Phys. Earth Planet. Int., 162, 119-128, 2007.
Seagle, C., A. J. Campbell, D. L. Heinz, G. Shen, V. Prakapenka, Thermal Equation of State of Fe3S and Implications for Sulfur in Earth's Core, J. Geophys. Res., 111, B06209, doi:10.1029/2005JB004091, 2006.
W. Mao, A. J. Campbell, D.L. Heinz and G. Shen, Phase relations of Fe-Ni alloys at high pressure and temperature, PEPI, 155, 11111146-151, 2006.
Mao, W. L., Meng, Y., Shen, G. Y.. Prakapenka, V. B., Campbell, A. J.. Heinz, D. L., Shu, J. F., Caracas, R., Cohen, R. E., Fei, Y. W., Hemley, R. J., Mao, H. K., Iron-rich silicates in the Earth's D '' layer, Proceedings Of The National Academy Of Sciences Of The United States Of America, 102, 9751-9753, 2005.
Lay, T., D. Heinz, M. Ishii, S.-H. Shim, J. Tsuchiya, T. Tsuchiya, R. Wentzcovitch, D. Yuen, Multidisciplinary Impact of the Deep Mantle Phase Transition in Perovskite Structure, EOS, Trans. Amer. Geophys. Union, 86, 1and5, 2005.
Mao, W. L., Shen, G. Y., Prakapenka, V. B., Meng, Y., Campbell, A. J., Heinz, D. L., Shu, J. F., Hemley, R. J., Mao, H. K., Ferromagnesian postperovskite silicates in the D '' layer of the Earth, Proceedings Of The National Academy Of Sciences Of The United States Of America, 101, 15867-15869, 2004.
Mao, W. L., W. Sturhahn, D. L. Heinz, H. K. Mao, J. Shu and R. J. Hemley, Nuclear resonant x-ray scattering of iron hydride at high pressure, GRL, 31, L15618, doi:10.1029/2004GL020541, 2004.
Mao, W. L., H. K. Mao, P. J. Eng, T. P. Trainor, M. Newville, C. C. Kao, D. L. Heinz, J. Shu, Y. Meng and R. J. Hemley, Bonding changes in compressed superhard graphite, Science, 302, 425-427, 2003.
Lin, J. F., D. L. Heinz, et al., "Stability of magnesiowustite in Earth's lower mantle." Proceedings of the National Academy of Sciences of the United States of America 100(8): 4405-4408, 2003.
Lin, J. F., A. J. Campbell, et al., "Static compression of iron-silicon alloys: Implications for silicon in the Earth's core." J. Geophys. Res.-Solid Earth 108(B1), 2003.
Lin, J-F., D. L. Heinz, A. J. Campbell, J. M. Devine, W. L. Mao and G. Shen, Iron-Nickel alloy in the Earth's core, Geophys. Res. Lett., 29, 109/1-109/3, 2002.
Lin, J-F., D. L. Heinz, A. J. Campbell, J. M. Devine, and G. Shen, Iron-Silicon Alloy in Earth's Core? , Science, 295, 313-315, 2002.
Duffy, T. S., G. Shen, D. L. Heinz, J. Shu, Y. Ma, R. J. Hemley and H. K. Mao, Lattice strains in gold and rhenium to 37 GPa, Phys. Rev. B, 60, 15063-15073, 1999.
Duffy, T. S., G. Shen, D. L. Heinz, Y. Ma, R. J. Hemley, and H. K. Mao, Lattice strains in gold and rhenium under non-hydrostatic compression, in High-Pressure Materials Research, edited by R. M. Wentzcovitch, R. J. Hemley, W. J. Nellis, and P. Y. Yu, Materials Research Society Symp. Proc., vol. 499, 145-150, 1999.
Shen, G., and D. L. Heinz, 1998, High-Pressure Melting of Deep Mantle and Core Materials, in Ultrahigh-Pressure Mineralogy: Physics and Chemistry of the Earth's Deep Interior, R. J. Hemley (editor), Reviews in Mineralogy vol. 37, P. H. Ribbe (series editor), Mineralogical Society of America, Washington D. C., 369-396.
