David Walker

Examination of the chemical and physical evolution of the terrestrial planets by the methods of experimental petrology. Parallel interest in the development of new experimental techniques and new materials.

Fields of Interest

Mineralogy Petrology, Field Geology, Planetary Science, Materials Science


  • AB Oberlin 1968 
  • AM Harvard 1970 
  • PhD Harvard 1972

Honors & Awards

  • Clarke Medal Geochemical Society 1975 
  • Day Medal Geological Society of America 1994 
  • Member American Academy Arts and Sciences 1994 
  • Member National Academy of Science 1999 
  • Hess Medal American Geophysical Union 2010

Experimental petrology and origin of Fra Mauro rocks and soil (1972) Walker, D., Longhi, J. and Hays, J. F., Proc. Lunar Sci. Conf. 3rd, 797-817.

Behavior of x-ray mass absorption coefficients near absorption edges: Reynolds' Method Revisited (1973) Walker, D., Am. Mineral., 58, 1069-1072.

Origin of lunar feldspathic rocks (1973) Walker, D., Grove, T., Longhi, J., and Hays, J. F., Earth Planet. Sci. Lett., 20, 1013-1032.

Origin of titaniferous lunar basalts (1975), Walker, D., Longhi, J., Stolper, E. M., Grove, T., and Hays, J. F., Geochim. Cosmochim. Acta, 39, 1219-1235.

Differentiation of an Apollo 12 picrite magma (1976) Walker, D., Longhi, J., Kirkpatrick, R. J., and Hays, J. F., Proc. Lunar Sci. Conf. 7th, 1365-1389.

Crystallization history of lunar picritic basalt 12002: Phase equilibria and cooling rate studies (1976), Walker, D., Kirkpatrick, R. J., Longhi, J. and Hays, J. F., Geol. Soc. Am. Bull., 87, 646-656.

A numerical treatment of melt/solid segregation: Size of the eucrite parent body and stability of the terrestrial low-velocity zone (1978) Walker, D., Stolper, E. M. and Hays, J. F., J. Geophys. Res., 84, 6004-6013.

Abyssal tholeiites from the oceanographer fracture zone: II. Phase equilibria and mixing (1979) Walker, D., Shibata, T. and DeLong, S. E, Contrib. Mineral. Petrol., 70, 111-125.

Melt segregation from partially molten source regions: The importance of melt density and source region size (1981) Stolper, E. M., Walker, D., Hager, B. H. and Hays, J. F., J. Geophys. Res., 86, 6261-6271.

Soret separation of lunar liquid (1981) Walker, D., Lesher, C. E. and Hays, J. F., Proc. Lunar and Planet. Sci 12B, 991-999.

Komatiites and the structure of the Archaean mantle (1982) Nisbet, E. G. and Walker, D., Earth Planet. Sci. Lett., 60, 105-113.

Solution properties of silicate liquids from thermal diffusion experiments. (1986) Lesher, C.E. and Walker, D., Geochim. Cosmochim. Acta., 50, p. 1397-1411.

Cumulate compaction and melt migration in a temperature gradient. (1988) Lesher, C.E. and Walker, D.,  J. Geophys. Res., 93, 10, 295-10,311.

Static compression and olivine flotation in ultrabasic silicate liquid. (1988) Agee, C.B. and Walker D.,  J. Geophys. Res., 93, 3437-3449.

Anticrack associated faulting at very high pressure in natural olivine.  (1990) Green, H. W. II, Young, T. E., Walker, D., and Scholz, C. H., Nature, 348, 720-722.

Some simplifications to multianvil devices for high pressure experiments. (1990) Walker, D., Carpenter, M. A., and Hitch, C. M., Am. Mineral., 75, 1020-1028.

Lubrication, gasketing, and precision in multianvil experiments. (1991) Walker, D., Am. Mineral., 76, 1092-1100.

Thermal diffusion in petrology. (1991) Lesher, C. E. and Walker, D., in Diffusion, Atomic Ordering, and Mass Transport., J. Gangully, ed., Adv. in Phys. Geochem., V8, 396-457.

Halite Pseudomorphs after Gypsum: a suggested mechanism (1992) Schreiber, B. C. and Walker, D., J. Sediment. Petrol., 62, 61-70.

Brucite dehydration and the molar volume of water to 15 GPa. (1993) Johnson, M. C. and Walker, D.,  Am. Mineral., 78, 271-284.

Superheating effects on metal-silicate partitioning of siderophile elements (1993) Walker, D., Norby, L., and Jones, J. H., Science, 262, 1858-1861.

High pressure synthesis and structure of new spinel - related series LnCu2O4(Ln=Nd,Gd,Er,Lu,Y), (1995), Chen, B.-H., D. Walker, E. Y. Suard and B. A. Scott,  Chem. Materials, 7, 355-357.

High pressure synthesis of NdCuO3-d  Perovskites (0≤ d ≤0.5), (1995) Chen, B.-H., D. Walker, E. Y. Suard, B. A. Scott, B. Mercy, M. Hervieu, B. Raveau, Inorganic Chem., 34, 2077-2083.

Application of scanning SQUID petrology to high-pressure materials science (1997) Scott, B., J.R. Kirtley, D. Walker, B-H. Chen, and Y. Wang, Nature, 389, 164-167.

Anatomy of High Pressure Synthesis Reactions in the Sr-Cu-O-Cl System (1998) Walker, D., B.A. Scott, B.-H. Chen, and Y. Wang, Physica C 299, 52-58.

S diffusivity in Fe-Ni-S-P melts (1998) Majewski, E. and Walker, D. Earth and Planetary Science Letters, 160, 823-830.

Core formation in the presence of various C-H-O volatiles (1999) Jana, D. and Walker, D., Geochim. Cosmochim. Acta, 63, 2299-2310.

Core participation in mantle geochemistry: Geochemical Society Ingerson Lecture. (2000) D. Walker, Geochimica Cosmochimica Acta, 64, 2897-2911.

Synthesis and thermal decomposition of RbClO4 and the volume of fluid O2 from 2-9 GPa. (2001) D Walker, G Hughes, LMD Cranswick, SM Clark, and S Buhre. Geochemistry Geophysics Geosystems, 2, paper 2001GC000154, 17pp.

Thermal decomposition of rhombohedral KClO3 from 29-76 kilobars and implications for the molar volume of fluid oxygen at high pressures. (2001) MC Johnson, D Walker, SM Clark, and RL Jones. American Mineralogist, 86, 1367-1379.

O2 volumes at high pressure from KClO4: D” as a siderophile element pump instead of a lid on the core (2002) D. Walker, S.M. Clark, L.M.D. Cranswick, M.C. Johnson, and R.L. Jones, Geochemistry Geophysics Geosystems, 3, #11, 26 pages, 23 November, paper GC000225.

Thermal equations of state for B1 and B2 KCl. American Mineralogist, 87, 815-812 (2002)  D. Walker, L.M.D. Cranswick, P.K. Verma, S.M. Clark, and S. Buhre.

Experimental partitioning of Tc, Mo, Ru, and Re between solid and liquid during crystallization in Fe-Ni-S (2004) GC Lazar, D Walker, and RJ Walker. Geochimica Cosmochimica Acta, 68, 643-651.

Halite-sylvite thermoelasticity (2004) D. Walker, P.K. Verma, L.M.D. Cranswick, S.M. Clark, R.L. Jones, and S. Buhre, American Mineralogist, 89, 204-210

Halite-sylvite thermoconsolution (2005) D. Walker, P.K. Verma, L.M.D. Cranswick, S.M. Clark, R.L. Jones, and S. Buhre, American Mineralogist, 90, 229-239.

Core-mantle chemical issues (2005) D. Walker, Canadian Mineralogist, Fleet Volume, 43, 1553-1564.

Does the Core Leak? (2005) RJ Walker and D Walker, EOS 86, 237,242.

Constraints on core formation from Pt partitioning in mafic silicate liquids at high temperature. EA Cottrell and D Walker (2006) Geochimica Cosmochimica Acta, 70, 1565-1580.

Experimental partitioning of uranium between liquid iron sulfide and liquid silicate: implications for radioactivity in the Earth’s core. KT Wheeler, D Walker, Y Fei, WG Minarik, and WF McDonough (2006) Geochimica Cosmochimica Acta, 70, 1537-1547.

Core/mantle-like interactions in an electric field. A Kavner and D Walker (2006) Earth and Planet. Sci. Lett., 248, 316-329.

Galena stability to 26 kilobars (2007) KT Wheeler, D Walker, and MC Johnson. American Journal of Science, 307, 590–611, DOI 10.2475/03.2007.02

Externally driven charge transfer in silicates at high pressures and temperature: a XANES study. (2007) A Kavner, D Walker, S Sutton, M Newville, Earth Planet Sci. Lett.256, 314-327

Laser-heated diamond anvil cell at the Advanced Light Source beamline 12.2.2. (2007) WA Caldwell, M Kunz, RS Celestre, EE Domning, MJ Walter, D Walker, J Glossinger, AA McDowel, HA Padmore, R Jeanloz, and SM Clark, Nuclear Inst. Methods in Physics Res. A 582, 221-225

Molybdenum partitioning to 60 kilobars along a warped Fe-FeS liquidus (2008) D Walker and J Li. Chemical Geology 248, 166-173.

Carbon solubility in core melts in a shallow magma ocean environment and distribution of carbon between the Earth’s core and the mantle, (2008) R Dasgupta and D Walker. GCA 72, 4627-4621. doi:10.1016/j.gca.2008.06.023

Low Osmium solubility in silicate at high pressures and temperatures. (2009) T Yokoyama, D Walker, and RJ Walker, EPSL, 279, 165-173. doi:10.1016/j.epsl.2008.12.046

Metal silicate partitioning of tungsten at high pressure and temperature: implications for equilibrium core formation in earth. (2009) EA Cottrell, MJ Walter, and D Walker. EPSL in press, doi:10.1016/j.epsl.2009.02.024

Erratum to “Metal–silicate partitioning of tungsten at high pressure and temperature: Implications for equilibrium core formation in Earth” (2009) EA Cottrell, MJ Walter, and D Walker, Earth Planet. Sci. Lett., doi:10.1016/j.epsl.2009.11.040.

X-ray absorption contrast images of binary chemical reactions. (2009) D Walker, OT Lord, MJ Walter, and SM Clark. Chemical Geology, 269, 211-220. doi:10.1016/j.chemgeo.2008.12.025

Melting in the Fe-C system to 70 GPa (2009) OT Lord, MJ Walter, R Dasgupta, D Walker, and SM Clark. EPSL, 284, 157-167, doi:10.1016/j.epsl.2009.04.017

High-pressure melting relations in Fe–C–S systems: Implications for formation, evolution, and structure of metallic cores in planetary bodies (2009) Dasgupta R, Buono A, Whelan G, and Walker D, Geochimica et Cosmochimica Acta 73 6678–6691, doi:10.1016/j.gca.2009.08.001

The pattern of Ni and Co abundances in lunar olivines. (2010) J Longhi, SR Durand, and D Walker. Geochimica et Cosmochimica Acta, 74, 784-798, doi:10.1016/j.gca.2009.10.001

Experimental techniques for determining tin solubility in silicate melts using silica capsules in one-atm furnaces and rhenium capsules in the piston cylinder (2010) Paparoni G, Webster JD, and Walker D, American Mineralogist, V 95, 776-783, doi:10.2138/am.2010.3317.

Cassiterite-saturated minimum melting behavior within Sn-SnO2-SiO2 at 1 atm and 10 kbar. (2010) Paparoni G, Walker D, and Webster JD, American Mineralogist, V 95, 784-798, doi:10.2138/am.2010.3319

Early accretion and core-mantle exchange constrained by Pd and Ag, (2011) KT Wheeler, D Walker, and WF McDonough. Meteoritics and Planetary Science, V 46, 199-217, doi: 10.1111/j.1945-5100.2010.01145.x.

The Fe-rich liquidus in the Fe-FeS system from 1 bar to 10 GPa (2011) AS Buono and D Walker. Geochemica Cosmochimica Acta, v75, 2072-2087, doi:10.1016/j.gca.2011.01.030

Carbon solution and partitioning between metallic and silicate melts in a shallow magma ocean: implications for the origin and distribution of terrestrial carbon (2013) R Dasgupta, H Chi, N Shimizu, AS Buono, & D Walker, Earth Planet. Sci. Lett., 102, 191-212.

Nonstoichiometry and growth of some Fe carbides (2013) D Walker, R Dasgupta, J Li, AS Buono, Contributions to Mineralogy and Petrology, 166, 935-957, DOI 10.1007/s00410-013-0900-7.

Plates, planets, and phase changes: 50 years of petrology (2013) D Walker, in Bickford, M.E., ed., The Web of Geological Sciences: Advances, Impacts, and Interactions: Geological Society of America Special Paper 500, p. 1–32, doi:10.1130/2013.2500(01).

Siderophile Element Partitioning between Cohenite and Liquid in Fe-Ni-S-C and Implications for Geochemistry of Planetary Cores and Mantles (2013) AS Buono, R Dasgupta, C-T A Lee & D Walker, Geochemica Cosmochimica Acta, 120, 239-250, doi 10.1016/j.gca.2013.06.024.

Polar and Magnetic Mn2FeMO6 (M = Nb, Ta) with LiNbO3-type Structure  -  High Pressure Synthesis (2013) M-R Li, D Walker, M Retuerto, T Sarkar, J Hadermann, PW Stephens, M Croft, A Ignatov, CP Grams, J Hemberger, I Nowik, P S Halasyamani, TT Tran, S Mukherjee, TS Dasgupta, M Greenblatt, Angew. Chem. Int. Ed., 52, 1 – 6, DOI: 10.1002/anie.201302775

Thermocompression of pyrope-grossular solid solutions. (2015) W. Du, D. Walker, and S.M. Clark, American Mineralogist 100, 215-222. DOI: http://dx.doi.org/10.2138/am-2015-4752

H, not O or pressure, causes eutectic T depression in the Fe-FeS system to 8 GPa. (2014) A.S. Buono and D. Walker, Meteoritics and Planetary Science, DOI:10.1111/maps.12372

Experimental investigations of condensation predictions for dust-enriched systems. (2014) G. Ustunisik, D.S Ebel, D. Walker, and J.S. Boesenberg. Geochim. Cosmochim. Acta 142, 27-38, doi:10.1016/j.gca.2014.07.029

Magnetic-Structure-Stabilized Polarization in an Above-Room-Temperature Ferrimagnet (2014) M. Li, M. Retuerto, D. Walker, T. Sarkar, P.W. Stephens, S. Mukherjee, T. S. Dasgupta, J. P. Hodges, M. Croft, C. P. Grams, J. Hemberger, J. Sanchez-Benitez, A. Huq, F. O. Saouma, J.I. Jang, and M. Greenblatt, Angewandte Chem. Int. Ed. 53, 10774-10778, DOI: 10.1002/anie.201406180

Designing Polar and Magnetic Oxides: Zn2FeTaO6 - in Search of Multiferroics (2014) M. Li,  P.W. Stephens, M. Retuerto, T. Sarkar, C.P. Grams, J. Hemberger, M.C. Croft, D. Walker, and M. Greenblatt. J. Amer. Chem. Soc. 136, 8508-8511, dx.doi.org/10.1021/ja502774v.

Mn2FeWO6 – a New Ni3TeO6-Type Polar and Magnetic Oxide. (2015) M. Li, Mark Croft, P. W. Stephens, M. Ye, D. Vanderbilt, M. Retuerto, Z. Deng, C. P. Grams, J. Hemberger, J. Hadermann, W–M. Li, C–Q. Jin, F.O. Saouma, J. I. Jang, H. Akamatsu, V. Gopalan, D. Walker, M. Greenblatt, Advanced Materials, DOI: 10.1002/adma.201405244

Strong Electron Hybridization and Fermi-to-Non-Fermi Liquid Transition in LaCu3Ir4O12. (2014) M. Li, M. Retuerto, Z. Deng, T. Sarkar, J. Sánchez-Benítez, M.C. Croft, T. S. Dasgupta, T. Das, T.A. Tyson, D. Walker, M. Greenblatt. Chemistry of Materials, 27, 211-217, DOI: 10.1021/cm503781s.

Size-dependent bulk modulus of nanoceria: minimum near 33nm. (2015) P. Rodenbaugh, J. Song, D. Walker, S.M. Clark, B. Kalkan, and S-W. Chan, Applied Physics Letters, 106, 163101 (2015); doi: 10.1063/1.4918625

The whole-block approach to measuring hydrogen diffusivity in nominally anhydrous minerals. (2015) E. Ferriss, T. Plank, D. Walker, and M. Nettles, American Mineralogist, 100, 837-851, DOI: http: //dx.doi.org/10.2138/am-2015-4947.

Structure and properties of silica glass densified in cold compression and hot compression (2015) M. Guerette, M. R. Ackerson, J. Thomas, F. Yuan, E. B. Watson, D. Walker, & L. Huang, Scientific Reports | 5:15343 | DOI: 10.1038/srep15343

Giant Magnetoresistance in the Half-Metallic Double-Perovskite Ferrimagnet Mn2FeReO6 (2015) M-R Li, M Retuerto, Z Deng, P W Stephens, M Croft, Q Huang, H Wu, X Deng, G Kotliar, J Sanchez-Benitez, J Hadermann, D Walker, and M Greenblatt. Angew. Chem. Int. Ed. 2015, 54, 12069 –12073, DOI: 10.1002/anie.201506456

Thermal, compositional, and compressional demagnetization of cementite. (2015) D. Walker, J. Li, B. Kalkan, and S.M. Clark, American Mineralogist, 100, 2610-2624,  DOI: http://dx.doi.org/10.2138/am-2015-5306

Excess mixing volume, microstrain, Ca-Mg disorder, and stability of pyrope-grossular garnets. (2016) W. Du, S.M. Clark, and D. Walker, American Mineralogist, 101, 193-204,  DOI: http://dx.doi.org/10.2138/am-2016-5128

Origin and consequences of non-stoichuiometry in iron carbide Fe7C3 (2019) Zhu F, Li J, Walker D Liu J, Lai X, Zhang D, American Mineralogist, 104, 325-332, DOI:https://10.2138/am-2019-6672

Castable solid pressure media for multianvil devices (2020) D Walker and J Li, Matter and Radiation at extremes doi: 10.1063/1.5129534