Don Weidner Donald J. Weidner

 Distinguished Professor 
 Director of the Mineral Physics Institute
 Office: ESS 220    
 E-mail Address:

 A.B., Harvard University, 1967 
 Ph.D., Massachusetts Institute of Technology, 1972 
 Faculty member at Stony Brook since 1972 


Professor Weidner's research interests focus on mineral physics and seismology. The ultimate goals are to combine these areas to help define the physical and chemical state as well as the dynamic processes of the Earth's mantle and crust. 

Weidner is currently director of the Mineral Physics Institute, of which he helped form in 1988. He has served in many roles in the department during the last several years, including deputy chairperson and coordinator for geosciences. Weidner was instrumental in organizing the graduate study advisory committee, a committee of graduate students that represents the needs of the students to the faculty, and he served as faculty advisor to this committee for several terms. 

Weidner's research has included earthquake seismology, but currently focuses on using laboratory studies of Earth materials to define constraints on the state and evolution of the Earth. He pioneered an experimental technique based on Brillouin spectroscopy for determining the elastic properties of single crystals. This technique allows such measurements on both natural and synthetic materials, thus enabling the determination of acoustic properties of phases that are stable only deep in the Earth's interior. This research effort was recognized by the American Geophysical Union in awarding him the James B. Macelwane award in 1981. Currently, this technique is being extended to high pressure, with the diamond anvil cell, and to high temperature. 

Weidner, along with Professors Prewitt and Liebermann, built the high-pressure facility at Stony Brook. He leads the Stony Brook large-volume, high-pressure studies with synchrotron radiation. This facility is used to determine the equation of state of Earth materials, identify phase stability fields of minerals and the yield strength of earth materials. He is the design team leader for the large-volume experiments that the GeoCARS program is preparing for the Advanced Photon Source.

Selected Publications  

Weidner, D. J., and Y. Zhao, 1992, Elasticity and equation of state of perovskite: Implications for the Earth's lower mantle, High Pressure Research: Applications to Earth and Planetary Sciences, Geophysical Monograph 67, ed Y. Syono and M. Manghnani, pub. Terra Scientific Publishing Co. and AGU, Washington D.C., 191-196.

Weidner, D. J., M. T. Vaughan, J. Ko, Y. Wang, K. Leinenweber, X. Liu, A. Yeganeh-Haeri, R. E. Pacalo, and Y. Zhao, 1992, Large volume high pressure re-search using the wiggler port at NSLS, High Pressure Research, 8, 617-623.

Weidner, D. J., M. T. Vaughan, J. Ko, Y. Wang, X. Liu, A. Yeganeh-Haeri, R. E. Pacalo, and Y. Zhao, 1992, Characterization of stress,  pressure and temperature in SAM-85, a DIA type high pressure apparatus, High Pressure Research: Applications to Earth and Planetary Sciences, Geophysical Monograph 67, ed Y. Syono and M. Manghnani, pub. Terra Scientific Publishing Co. and AGU, Washington D.C., 13-17.

Pacalo, R. E. G., D. J. Weidner, and T. Gasparik, 1992, Elastic properties of sodium-rich majorite garnet, Geophys. Res. Lett., 19, 1895-1898.

Yeganeh-Haeri, A., D. J. Weidner, and J. B. Parise, 1992, Elasticity of *-cristobalite: A silicon dioxide with a negative Poisson's ratio, Science, 257, 650-652 .

Zhao, Y., D. J. Weidner, J. B. Parise, and D. E. Cox, 1992, Critical phenomena and phase transition of perovskite--data for NaMgF 3 perovskite: (II), Phys. Earth and Planet. Interiors, 76, 17-34.

Zhao, Y., D. J. Weidner, J. Ko, K. Leinenweber, X. Liu, B. Li, Y. Meng, R. E. G. Pacalo, M. T. Vaughan, Y. Wang, and A. Yeganeh-Haeri, 1992, Perovskite at high P-T conditions: An in-situ synchrotron X-ray diffraction study of NaMgF3 perovskite, J. Geophys. Res., 99, 2871-2885.

Navrotsky, A., D. J. Weidner, R. C. Liebermann, and C. T. Prewitt, 1992, Materials science of the Earth's deep interior, 17, MRS Bulletin, 30-37.

Meng, Y., D. J. Weidner, and Y. Fei, 1993, Deviatoric stress in a quasi-hydrostatic diamond anvil cell: Effect on the volume-based pressure calibration, Geophys. Res. Lett., 20, 1147-1150.

Zhao, Y. and D. J. Weidner, 1993, The single crystal elastic moduli of neighborite, Phys. Chem. of Minerals, 20, 419-424.

Weidner, D. J. and H.-k. Mao, 1993, Photons at high pressure, National Synchrotron Light Source Newsletter, March, pp. 1-15.

Kusaba, K., L. Galoisy, Y. Wang, M. T. Vaughan, and D. J. Weidner, 1993, Determination of phase transition pressures of ZnTe under quasihydrostatic conditions, Pure and Applied Geophysics (PAGEOPH) in memory of Edward Schreiber (Experimental Techniques in a Laboratory), 141, in press.

Weidner, D.J., Y. Wang, Y. Meng, and M.T. Vaughan, Deviatoric stress measurements at high pressure and temperature, In Proceedings of AIRAPT/APT meeting High Pressure Science and Technology 1993, Pub. American Institute of Physics, ed: S.C. Schmidt, J.W. Shaner, G.A. Samara, M. Ross, 1025-1028.

Meng, Y., D. J. Weidner, G. D. Gwanmesia, R. C. Liebermann, M. T. Vaughan, Y Wang, K. Leinenweber, R. E. Pacalo, A. Yeganeh-Haeri, and Y. Zhao, 1993, In situ P-T X-ray diffraction studies on three polymorphs (* ,*, *) of Mg2SiO4, J. Geophys. Research, 98, 22,199-22,207.

Weidner, D. J., Y. Wang, and M. T. Vaughan, 1994, Yield strength at high pressure and temperature, Geophys. Res. Lett., 21, 753-756.

Kusaba, K. and D. J. Weidner, 1994, Structure of high pressure phase I in ZnTe, In Proceedings of AIRAPT/APT meeting High Pressure 
Science and Technology 1993, Pub. American Institute of Physics, ed: S.C. Schmidt, J.W. Shaner, G.A. Samara, M. Ross, 553-556.

Parise, J. B., A. Yeganeh-Haeri, D. J. Weidner, J. D. Jorgensen, and M. A. Saltzberg, 1994, Pressure induced phase transition and pressure 
dependence of crystal structure in low (*) and Ca/Al-doped cristobalite, J. Appl. Phys., 75, 1361-1367.

Zhao, Y., J. B. Parise, Y. Wang, K. Kusaba, M. T. Vaughan, D. J. Weidner, T. Kikegawa, J. Chen, and O. Shimomura, 1994, High-pressure 
crystal chemistry of NaMgF3 perovskite: an angle dispersive diffraction study using monochromatic synchrotron x-radiation, Amer. Minealogist, 
79, 615-621.

Parise, J. B., K. Leinenweber, D. J. Weidner, K. Tan, and R. B. V. Dreele, 1994, Pressure-induced hydrogen bonding: neutron diffraction study 
of brucite, Mg(OD)2, to 9.3 GPa, Amer. Mineral., 79, 193-196.

Wang, Y., D.J. Weidner, R.C. Liebermann, and Y Zhao, 1994, P-V-T equation of state of (Mg,Fe)SiO3 perovskite: constraints on 
composition of the lower mantle, Phys. Earth and Planet. Interiors, 83, 13-40.

Wang, Y. and D. J. Weidner, 1994, Thermoelasticity of CaSiO 3 perovskite and implications for the lower mantle, Geophys. Res. 
Lett., 21, 895-898.

Weidner, D.J., Y. Wang, and M.T. Vaughan, 1994, Strength of diamond, Science, in press.

Meng, Y., Y. Fei, D.J. Weidner, and J. Hu, 1994, Hydrostatic compression of g-Mg2SiO4 to mantle pressures and 700 K: 
constraints on the thermal equation of state and the related thermoelastic properties, submitted to Phys. Chem. Miner.

Wang, Y., I. C. Getting, D. J. Weidner and M. T. Vaughan (1996). Performance of tapered anvils in a cubic-anvil, DIA-type, 
high-pressure apparatus for in situ x-ray diffraction studies. US-Japan High Pressure Conference Submitted.

Wang, Y. and D. J. Weidner (1995). (6m/dT) of the lower mantle. Pageoph, special issue: submitted.

Wang, Y., D. J. Weidner and F. Guyot (1995). Thermal equation of state of CaSiO3 perovskite. J. Geophys. Res. 101(B1): 661-672.

Weidner, D. J., Y. B. Wang, G. Chen and J. Ando (1996). Rheology measurements at high pressure and temperature. 
U.S.-Japan Seminar, High Pressure-Temperature Conference, Submitted. 

News & Announcements

Geosciences Seminar

Geosciences Department Newsletter


Stony Brook Geosciences going Far Beyond: Newest Department of Geosciences faculty member Weisen Shen's seismological research takes him to the South Pole.

Richard Reeder named Vice President for Research and Operations Manager

Mars Rover collects exciting evidence from Gale Crater

Congratulations to Scott McLennan who was named Distinguished Professor

Funding Opportunity for MS applicants interested in Instrumentation

Geosciences alum Barbara Cohen named to leadership position for Mars Exploration Rovers 

Q & A with Geosciences Graduate Student Steven Jaret as he prepares for the International FameLab national finals in Washington D.C. 

Geosciences Graduate Students bring hands-on Science education to area elementary schools

Melissa Sims chosen to introduce Secretary of Energy at NSLS-II Dedication

Celebrating Robert Cooper Liebermann

Professor Joel Hurowitz named Deputy PI for Mars 2020 Rover Instrument

PhD Student Yuyan (Sara) Zhao selected for Prestigious Dwornik Award

Professor Timothy Glotch to lead NASA funded research team

Professor Martin Schoonen named Chairman of the Environmental Sciences Department at BNL

Professors John Parise and Artem Oganov pursue Materials Genome Initiative

Professor Deanne Rogers finds evidence for past groundwater on Mars

Professor Robert Liebermann accepts Edward A. Flinn Award

Professor Scott McLennan selected for NASA's Mars Science Laboratory Team

Professor Timothy Glotch receives NSF Career Award

Geosciences PhD Francis McCubbin receives Presidential Early Career Award

Professor Scott McLennan on NASA team that finds new evidence for water at Mars crater

Geoscience Researchers Develop Numerical Model to Better Forecast Forces Behind Earthquakes 

Geoscience Professor Don Weidner selected to receive Inge Lehman Medal

Geoscience researchers find that natural minerals disinfect drinking water

Professor Dan Davis publishes 4th edition of "Turn Left at Orion"

Stony Brook PhD and Faculty Advisor Show that the Moon Isn't as Dry as Previously Thought

The Department welcomes its new faculty member, Deanne Rogers

Jerome Varriale, Geosciences major, Named URECA Researcher of the Month  


Department of Geosciences - Earth and Space Science Building, Stony Brook, NY 11794-2100  Phone: (631) 632-8200
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