Smithsonian National Museum of Natural History

Jeffrey Post

Chair of Mineral Sciences, Mineralogist and Curator of Gems and Minerals
Department / Division
Education
  • B.S., University of Wisconsin, Platteville
  • Ph.D., Arizona State University
Research Interests
Environmental mineralogy; single crystal and powder X-ray diffraction; electron microscopy; manganese oxide minerals; clay minerals; computer modeling of mineral structures, rietveld analysis; gemology.
Publications
Article
  • Butler, James E., Post, Jeffrey E., and Wang, Wuyi. 2017. "The Foxfire diamond, revisited." Gems & Gemology 53 (4):479–481.
  • Ling, Florence T., Post, Jeffrey E., Heaney, Peter J., Kubicki, James D., and Santelli, Cara M. 2017. "Fourier-transform infrared spectroscopy (FTIR) analysis of triclinic and hexagonal birnessites." Spectrochimica Acta Part A, Molecular and Biomolecular Spectroscopy 178:32–46. https://doi.org/10.1016/j.saa.2017.01.032
  • Zubkov, V. I., Solomnikova, A. V., Post, Jeffrey E., Gaillou, Eloise, and Butler, J. E. 2017. "Characterization of electronic properties of natural type IIb diamonds." Diamond and Related Materials 72:87–93. https://doi.org/10.1016/j.diamond.2017.01.011
  • Ilton, Eugene S., Post, Jeffrey E., Heaney, Peter J., Ling, Florence T., and Kerisit, Sebastien N. 2016. "XPS determination of Mn oxidation states in Mn (hydr)oxides." Applied Surface Science 366:475–485. https://doi.org/10.1016/j.apsusc.2015.12.159
  • Peterson, Kristina M., Heaney, Peter J., and Post, Jeffrey E. 2016. "A kinetic analysis of the transformation from akaganeite to hematite: An in situ time-resolved X-ray diffraction study." Chemical Geology 444:27–36. https://doi.org/10.1016/j.chemgeo.2016.09.017
  • Post, Jeffrey E., Thomas, Ellen, and Heaney, Peter J. 2016. "Jianshuiite in oceanic manganese nodules at the Paleocene-Eocene boundary." American Mineralogist 101 (2):407–414. https://doi.org/10.2138/am-2016-5347
  • Hwang, Gil Chan, Post, Jeffrey E., and Lee, Yongjae. 2015. "In situ high-pressure synchrotron X-ray powder diffraction study of tunnel manganese oxide minerals: hollandite, romanechite, and todorokite." Physics and Chemistry of Minerals 1–7. https://doi.org/10.1007/s00269-014-0731-8
  • Ling, Florence T., Heaney, Peter J., Post, Jeffrey E., and Gao, Xiang. 2015. "Transformations from triclinic to hexagonal birnessite at circumneutral pH induced through pH control by common biological buffers." Chemical Geology 416:1–10. https://doi.org/10.1016/j.chemgeo.2015.10.007
  • Peterson, Kristina M., Heaney, Peter J., Post, Jeffrey E., and Eng, Peter J. 2015. "A refined monoclinic structure for a variety of “hydrohematite”." American Mineralogist 100 (2-3):570–579. https://doi.org/10.2138/am-2015-4807
  • Post, Jeffrey E. and Farges, Francois. 2014. "The Hope Diamond: Rare Gem, Historic Jewel." Rocks & Minerals 89 (1):16–25. https://doi.org/10.1080/00357529.2014.842831
  • Post, Jeffrey E. and Heaney, Peter J. 2014. "Time-resolved synchrotron X-ray diffraction study of the dehydration behavior of chalcophanite." American Mineralogist 99 (10):1956–1961. https://doi.org/10.2138/am-2014-4760
  • Rakovan, John, Gaillou, Eloïse, Post, Jeffrey E., Jaszczak, John A., and Betts, John H. 2014. "Optically Sector-Zoned (Star) Diamonds from Zimbabwe." Rocks & Minerals 89 (2):173–178. https://doi.org/10.1080/00357529.2014.842844
  • Fleeger, Claire R., Heaney, Peter J., and Post, Jeffrey E. 2013. "A time-resolved X-ray diffraction study of Cs exchange into hexagonal H-birnessite." American Mineralogist 98 (4):671–679. https://doi.org/10.2138/am.2013.4287
  • Gaillou, E., Post, Jeffrey E., Rose, Timothy R., and Butler, J. E. 2013. "Cathodoluminescence of Natural, Plastically Deformed Pink Diamonds." Microscopy and Microanalysis 18 (6):1292–1302. https://doi.org/10.1017/S1431927612013542
  • Ivanova, Marina A., Lorenz, Cyril A., Franchi, Ian A., Bychkov, Andrei Y., and Post, Jeffrey E. 2013. "Experimental simulation of oxygen isotopic exchange in olivine and implication for the formation of metamorphosed carbonaceous chondrites." Meteoritics & Planetary Science 48 (10):2059–2070. https://doi.org/10.1111/maps.12204
  • Cygan, Randall T., Post, Jeffrey E., Heaney, Peter J., and Kubicki, James D. 2012. "Molecular models of birnessite and related hydrated layered minerals." American Mineralogist 97 (8-9):1505–1514. https://doi.org/10.2138/am.2012.3957
  • Gaillou, Eloïse, Post, Jeffrey E., Rost, Detlef, and Butler, James E. 2012. "Boron in natural type IIb blue diamonds: Chemical and spectroscopic measurements." American Mineralogist 97 (1):1–18. https://doi.org/10.2138/am.2012.3925
  • Hummer, Daniel R., Heaney, Peter J., and Post, Jeffrey E. 2012. "In situ observations of particle size evolution during the hydrothermal crystallization of TiO2: A time-resolved synchrotron SAXS and WAXS study." Journal of Crystal Growth 344 (1):51–58. https://doi.org/10.1016/j.jcrysgro.2012.01.044
  • Zhu, Mengqiang, Farrow, Christopher L., Post, Jeffrey E., Livi, Kenneth J. T., Billinge, Simon J. L., Ginder-Vogel, Matthew, and Sparks, Donald L. 2012. "Structural Study of Biotic and Abiotic Poorly-Crystalline Manganese Oxides Using Atomic Pair Distribution Function Analysis." Geochimica et Cosmochimica Acta 81:39–55. https://doi.org/10.1016/j.gca.2011.12.006
  • Lopano, Christina L., Heaney, Peter J., Bandstra, Joel Z., Post, Jeffrey E., and Brantley, Susan L. 2011. "Kinetic Analysis of Cation Exchange in Birnessite Using Time-Resolved Synchrotron X-ray Diffraction." Geochimica et Cosmochimica Acta 75 (14):3973–3981. https://doi.org/10.1016/j.gca.2011.04.021
  • Post, Jeffrey E., Heaney, Peter J., and Cho, Yunchul. 2011. "Neutron diffraction study of hydrogen in birnessite structures." American Mineralogist 96 (4):534–540. https://doi.org/10.2138/am.2011.3629
  • Rowland, Clare E., Cahill, Christopher L., and Post, Jeffrey E. 2011. "The structure of braitschite, a calcium rare earth borate." American Mineralogist 96 (1):197–201. https://doi.org/10.2138/am.2011.3592
  • Wall, Andrew J., Heaney, Peter J., Mathur, Ryan, Post, Jeffrey E., Hanson, Jonathan C., and Eng, Peter J. 2011. "A flow-through reaction cell that couples time-resolved X-ray diffraction with stable isotope analysis." Journal of Applied Crystallography 44 (2):429–432. https://doi.org/10.1107/S0021889811000525
  • Wall, Andrew J., Mathur, Ryan, Post, Jeffrey E., and Heaney, Peter J. 2011. "Cu isotope fractionation during bornite dissolution: An in situ X-ray diffraction analysis." Ore Geology Reviews 42 (1):62–70. https://doi.org/10.1016/j.oregeorev.2011.01.001
  • Gaillou, Eloise, Post, Jeffrey E., Bassim, N. D., Zaitsev, A. M., Rose, Timothy R., Fries, M. D., Stroud, R. M., Steele, A., and Butler, J. E. 2010. "Spectroscopic and microscopic characterization of color lamellae in natural pink diamonds." Diamond and Related Materials 19 (10):1207–1220. https://doi.org/10.1016/j.diamond.2010.06.015
  • Gaillou, Eloise, Wang, Wuyi, Post, Jeffrey E., King, John M., Butler, James E., Collins, Alan T., and Moses, Thomas M. 2010. "The Wittelsbach-Graff and Hope Diamonds: Not Cut from the Same Rough." Gems & Gemology 46 (2):80–88. https://doi.org/10.5741/GEMS.46.2.80
  • Stubbs, Joanne E., Post, Jeffrey E., Elbert, David C., Heaney, Peter J., and Veblen, David R. 2010. "Uranyl phosphate sheet reconstruction during dehydration of metatorbernite [Cu(UO2)2(PO4)2{middle dot}8H2O]." American Mineralogist 95 (8-9):1132–1140. https://doi.org/10.2138/am.2010.3439
  • Sucher, Scott D., Attaway, Stephen W., Attaway, Nancy L., and Post, Jeffrey E. 2010. "Possible "Sister" Stones of the Hope Diamond." Gems & Gemology 46 (1):28–35. https://doi.org/10.5741/GEMS.46.1.28
  • Hummer, Daniel R., Kubicki, James D., Kent, Paul R. C., Post, Jeffrey E., and Heaney, Peter J. 2009. "Origin of Nanoscale Phase Stability Reversals in Titanium Oxide Polymorphs." Journal of Physical Chemistry C 113 (11):4240–4245. https://doi.org/10.1021/jp811332w
  • Lopano, Christina L., Heaney, Peter J., and Post, Jeffrey E. 2009. "Cs-exchange in birnessite: Reaction mechanisms inferred from time-resolved X-ray diffraction and transmission electron microscopy." American Mineralogist 94 (5-6):816–826. https://doi.org/10.2138/am.2009.3068
  • Eaton-Magana, Sally, Post, Jeffrey E., Heaney, Peter J., Freitas, Jaime, Klein, Paul, Walters, Roy, and Butler, James E. 2008. "Using phosphorescence as a fingerprint for the Hope and other blue diamonds." Geology 36 (1):83–86. https://doi.org/10.1130/G24170A.1
  • Fischer, Timothy B., Heaney, Peter J., Jang, Je-Hun, Ross, Daniel E., Brantley, Susan L., Post, Jeffrey E., and Tien, Ming. 2008. "Continuous time-resolved X-ray diffraction of the biocatalyzed reduction of Mn oxide." American Mineralogist 93 (11-12):1929–1932. https://doi.org/10.2138/am.2008.3038
  • Gaillou, Eloise, Fritsch, Emmanuel, Aguilar-Reyes, Bertha, Rondeau, Benjamin, Post, Jeffrey E., Barreau, Alain, and Ostroumov, Mikhail. 2008. "Common gem opal: An investigation of micro- to nano-structure." American Mineralogist 93 (11-12):1865–1873. https://doi.org/10.2138/am.2008.2518
  • Heaney, Peter J., Post, Jeffrey E., Fischer, T. B., Hummer, Daniel R., Lopano, C. L., and Wall, A. J. 2008. "Applications of time-resolved synchrotron X-ray diffraction to cation exchange, crystal growth and biomineralization reactions." Mineral Mag 72 (1):175–184. https://doi.org/10.1180/minmag.2008.072.1.179
  • Hummer, Daniel R., Heaney, Peter J., and Post, Jeffrey E. 2008. "Thermal expansion of anatase and rutile between 300 and 575 K using synchrotron powder X-ray diffraction (vol 22, pg 352, 2007)." Powder Diffraction 23 (3):267–267. https://doi.org/10.1154/1.2966362
  • Post, Jeffrey E. and Heaney, Peter J. 2008. "Synchrotron powder X-ray diffraction study of the structure and dehydration behavior of palygorskite." American Mineralogist 93 (4):667–675. https://doi.org/10.2138/am.2008.2590
  • Post, Jeffrey E., Heaney, Peter J., and Ertl, A. 2008. "Rietveld refinement of the rancieite structure using synchrotron powder diffraction data." Powder Diffraction 23 (1):10–14. https://doi.org/10.1154/1.2836477
  • Eaton-Magana, S., Post, Jeffrey E., Heaney, Peter J., Walters, R. A., Breeding, C. M., and Butler, J. E. 2007. "Fluorescence spectra of colored diamonds using a rapid, mobile spectrometer." Gems & Gemology 43 (4):332–351. https://doi.org/10.5741/GEMS.43.4.332
  • Gaillou, Eloise and Post, Jeffrey E. 2007. "An examination of the Napoleon diamond necklace." Gems & Gemology 43 (4):352–357. https://doi.org/10.5741/GEMS.43.4.352
  • Hummer, Daniel R., Heaney, Peter J., and Post, Jeffrey E. 2007. "Thermal expansion of anatase and rutile between 300 and 575 K using synchrotron powder X-ray diffraction." Powder Diffraction 22 (4):352–357. https://doi.org/10.1154/1.2790965
  • Post, Jeffrey E., Bish, D., and Heaney, Peter J. 2007. "Synchrotron Powder X-ray Diffraction Study of the Structure and Dehydration Behavior of Sepiolite." American Mineralogist 92:91–97.
  • Post, Jeffrey E. and Heaney, Peter J. 2004. "Neutron and synchrotron X-ray diffraction study of the structures and dehydration behaviors of ramsdellite and "groutellite"." American Mineralogist 89 (7):969–975.
  • Post, Jeffrey E., Heaney, Peter J., Cahill, C. L., and Finger, L. 2003. "Woodruffite: A new Mn oxide structure with 3x4 tunnels." American Mineralogist 88:1697–1702.
  • McKeown, David A. and Post, Jeffrey E. 2001. "Characterization of manganese oxide mineralogy in rock varnish and dendrites using X-ray absorption spectroscopy." American Mineralogist 86 (5-6):701–713.
  • Ni, Y., Post, Jeffrey E., and Hughes, J. M. 1999. "The Crystal Structure of Parisite-(Ce),Ce2CaF2(CO)3." American Mineralogist 85:251–258.
  • Post, Jeffrey E., Wise, Michael A., Feather, R. C., and Pohwat, Paul W. 1998. "The Smithsonian Institution's new hall of geology, gems, and minerals." Rocks and Minerals 73:44–51.
  • Fritsch, S., Post, Jeffrey E., and Navrotsky, A. 1997. "Energetics of low temperature polymorphs of manganese dioxides and oxyhydroxides." Geochimica et Cosmochimica Acta 61:2613–2616.
  • Dai, Y. and Post, Jeffrey E. 1995. "Crystal structure of hillebrandite: a natural analogue of calcium silicate hydrate (CSH) phases in Portland cement." American Mineralogist 80:841–844.
  • Dai, Y., Post, Jeffrey E., and Appleman, Daniel E. 1995. "Crystal structure of minehillite: Twinning and structural relationships to reyerite." American Mineralogist 80:173–178.
  • Grobety, B. H. and Post, Jeffrey E. 1995. "Structure refinement and HRTEM study of astcophyllite from Strange Lake, Labrador, Canada." Geol.Soc.Amer.Abstr. 363.
  • Heaney, Peter J. and Post, Jeffrey E. 1995. "A neutron powder diffraction study of the low-high leucite phase transition." Geol.Soc.Amer.Abstr. 440.
  • Mandernack, K. W., Post, Jeffrey E., and Tebo, B. M. 1995. "Manganese mineral formation by bacterial spores of the marine Bacillus, strain SG-1: evidence for the direct oxidation of Mn(II) to Mn(IV)." Geochemica et Cosmochemica Acta 59:4393–4408.
  • Post, Jeffrey E. and Appleman, Daniel E. 1994. "Crystal structure refinement of lithiophorite." American Mineralogist 79:370–374.
  • Abbott, R. N., Jr., Burnham, C. W., and Post, Jeffrey E. 1990. "Hydrogen in Humite Group Minerals: Structure Energy Calculations." American Mineralogist 74:1300–1306.
  • Post, Jeffrey E. and Veblen, D. R. 1990. "Crystal Structure Determinations of Three Synthetic Birnessites using TEM and the Rietveld Method." American Mineralogist 75:477–489.
  • Abbott, R. N., Jr., Post, Jeffrey E., and Burnham, C. W. 1989. "Treatment of the Hydroxyl in Structure-Energy Calculations." American Mineralogist 74:141–150.
  • Bish, D. L. and Post, Jeffrey E. 1989. "Thermal Behavior of Complex, Tunnel-Structure Manganese Oxides." American Mineralogist 74:177–186.
  • Morris, D. E., Asmar, N. G., Wei, J. Y. T., Nickel, J. H., Sid, R. L., Scott, J. S., and Post, Jeffrey E. 1989. "Synthesis and Properties of the 2:4:7 Superconductors R2Ba4Cu7O15-x (R-Y, Eu, Gd, Dy, Ho, Er)." Physical Review 40:11406–11409.
  • Morris, D. E., Nickel, J. H., Wei, J. Y. T., Asmar, N. G., Scott, J. S. S., Hultgren, C. T., Markelz, A. G., Post, Jeffrey E., Heaney, Peter J., and Hazen, R. M. 1989. "Eight New High-temperature Superconductors with the 1:2:4 Structure." Physical Rev.B 39:7347–7350.
  • Post, Jeffrey E. and Bish, D. L. 1989. "Rietveld Refinement of the Coronadite Structure." American Mineralogist 74:913–917.
  • Post, Jeffrey E. and Appleman, Daniel E. 1988. "Chalcophanite, ZnMn307.3H20: New Crystal-structure Determinations." American Mineralogist 73:1401–1404.
  • Docka, J. A., Post, Jeffrey E., Bish, D. L., and Burnham, C. W. 1987. "Positional Disorder of the Apsite Cations in C2/m Amphiboles: Model Energy Calculations and Probability Studies." American Mineralogist 72:949–958.
  • Post, Jeffrey E. and Burnham, C. W. 1987. "Structure-energy Calculations on Low and High Albite." American Mineralogist 72:507–514.
  • Post, Jeffrey E. and Burnham, C. W. 1986. "Modeling Tunnel-cation Displacements in Hollandites Using Structure-energy Calculations." American Mineralogist 71:1178–1185.
  • Post, Jeffrey E. and Burnham, C. W. 1986. "(1986) Ionic Modeling of Mineral Structures and Energies in the Electron Gas Approximation: TiO2 Polymorphs, Quartz, Forsterite, Diopside." American Mineralogist 71:142–150.
  • Chamberlain, C. P., Docka, J. A., Post, Jeffrey E., and Burnham, C. W. 1985. "Scapolite: Alkali Atom Configurations, Antiphase Domains, and Compositional Variations." American Mineralogist 70:134–140.

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Chapter
  • Post, Jeffrey E. 1999. "Manganese Oxide Minerals: Crystal Structures and Economic and Environmental Significance." in Colloquium on Geology, Mineralogy, and Human Welfare, edited by Smith, J. V., 3447–3454. Washington, D.C.: National Academy of Sciences.
  • Post, Jeffrey E. and Bish, D. L. 1989. "Rietveld Refinements of Crystal Structures Using Powder X-ray Diffraction Data." in Modern Powder Diffraction, edited by Bish, D. L. and Post, Jeffrey E., 277–308. Washington, D. C.: Mineralogical Society of America.
  • Post, Jeffrey E. and Bish, D. L. 1989. "Rietveld Refinements of Crystal Structures Using Powder X-ray Diffraction Data." in Modern Powder Diffraction, edited by Bish, D. L. and Post, Jeffrey E., 277–308. Washington, D. C.: Mineralogical Society of America.