Smithsonian National Museum of Natural History

Jeffrey Post

Mineralogist and Curator-in-Charge 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
  • Liao, Shuai, Wang, Xiaoming, Yin, Hui, Post, Jeffrey E., Yan, Yupeng, Tan, Wenfeng, Huang, Qiaoyun, Liu, Fan, and Feng, Xionghan. 2020. "Effects of Al substitution on local structure and morphology of lepidocrocite and its phosphate adsorption kinetics." Geochimica et Cosmochimica Acta, 276 109–121. https://doi.org/10.1016/j.gca.2020.02.027.
  • Ling, Florence T., Post, Jeffrey E., Heaney, Peter J., Santelli, Cara M., Ilton, Eugene S., Burgos, William D., and Rose, Arthur W. 2020. "A multi-method characterization of natural terrestrial birnessites." American Mineralogist, 105, (6) 833–847. https://doi.org/10.2138/am-2020-7303.
  • Post, Jeffrey E., Feather, Russell, and Butler, James E. 2020. "Kimberley Diamond Acquired by the Smithsonian Institution, and Its Fluorescence and Phosphorescence Characteristics Revealed." Journal of Gemmology, 37, (1) 14–15. https://doi.org/10.15506/JoG.2020.37.1.14.
  • Post, Jeffrey E., McKeown, David A., and Heaney, Peter J. 2020. "Raman spectroscopy study of manganese oxides: Tunnel structures." American Mineralogist, 105, (8) 1175–1190. https://doi.org/10.2138/am-2020-7390.
  • Xie, Fei, Cao, Yu, Ranchon, Cindy, Hart, Alan, Hansen, Robin, Post, Jeffrey E., Whitney, Coralyn W., Dawson-Tarr, Emma, Drew, Alan J., and Dunstan, David J. 2020. "Explanation of the Colour Change in Alexandrites." Scientific Reports, 10, (1) Article 6130. https://doi.org/10.1038/s41598-020-62707-3.
  • Farfan, Gabriela A. and Post, Jeffrey E. 2019. "Quartz from Madagascar with Fuchsite Phantom Inclusions." The Journal of Gemmology, 36, (8) 698–699. https://doi.org/10.15506/JoG.2019.36.8.698.
  • Kong, Kyeong Pil, Fischer, Timothy B., Heaney, Peter J., Post, Jeffrey E., Stubbs, Joanne E., and Eng, Peter J. 2019. "Mineralogical and geochemical constraints on chromium oxidation induced by birnessite." Applied Geochemistry, 108 UNSP 104365–UNSP 104365. https://doi.org/10.1016/j.apgeochem.2019.104365.
  • Yang, Peng, Post, Jeffrey E., Wang, Qian, Xu, Wenqian, Geiss, Roy, McCurdy, Patrick R., and Zhu, Mengqiang. 2019. "Metal Adsorption Controls Stability of Layered Manganese Oxides." Environmental science & technology, 53, (13) 7453–7462. https://doi.org/10.1021/acs.est.9b01242.
  • Brooks, Alison S., Yellen, John E., Potts, Richard, Behrensmeyer, Anna K., Deino, Alan L., Leslie, David E., Ambrose, Stanley H., Ferguson, Jeffrey R., d'Errico, Francesco, Zipkin, Andrew M., Whittaker, Scott, Post, Jeffrey, Veatch, Elizabeth G., Foecke, Kimberly, and Clark, Jennifer B. 2018. "Long-distance stone transport and pigment use in the earliest Middle Stone Age." Science, 360, (6384) 90–94. https://doi.org/10.1126/science.aao2646.
  • Byrne, Keal S., Butler, James E., Wang, Wuyi, and Post, Jeffrey E. 2018. "Chameleon diamonds: Thermal processes governing luminescence and a model for the color change." Diamond and Related Materials, 81 45–53. https://doi.org/10.1016/j.diamond.2017.10.014.
  • Fischer, Timothy B., Heaney, Peter J., and Post, Jeffrey E. 2018. "Changes in the structure of birnessite during siderophore-promoted dissolution: A time-resolved synchrotron X-ray diffraction study." Chemical Geology, 476 46–58. https://doi.org/10.1016/j.chemgeo.2017.11.003.
  • Lin, Xiayang, Heaney, Peter J., and Post, Jeffrey E. 2018. "Iridescence in Metamorphic "Rainbow" Hematite." Gems & Gemology, 54, (1) 28–39. https://doi.org/10.5741/GEMS.54.1.28.
  • Ling, Florence T., Post, Jeffrey E., Heaney, Peter J., and Ilton, Eugene S. 2018. "The relationship between Mn oxidation state and structure in triclinic and hexagonal birnessites." Chemical Geology, 479 216–227. https://doi.org/10.1016/j.chemgeo.2018.01.011.
  • Megaw, Peter K. M., Huizing, Terry E., Richards, R. P., and Post, Jeffrey E. 2018. "Connoisseur's Choice: Distinctive Twinned Calcite from the Palmarejo Mine, Chihuahua, Mexico." Rocks & Minerals, 93, (5) 434–441. https://doi.org/10.1080/00357529.2018.1477010.
  • Peterson, Kristina M., Heaney, Peter J., and Post, Jeffrey E. 2018. "Evolution in the structure of akaganeite and hematite during hydrothermal growth: an in situ synchrotron X-ray diffraction analysis." Powder Diffraction, 33, (4) 287–297. https://doi.org/10.1017/S0885715618000623.
  • Rabenhorst, Martin and Post, Jeffrey E. 2018. "Manganese Oxides for Environmental Assessment." Soil Science Society of America Journal, 82, (2) 509–518. https://doi.org/10.2136/sssaj2017.08.0256.
  • Yang, Peng, Lee, Seungyeol, Post, Jeffrey E., Xu, Huifang, Wang, Qian, Xu, Wenqian, and Zhu, Mengqiang. 2018. "Trivalent manganese on vacancies triggers rapid transformation of layered to tunneled manganese oxides (TMOs): Implications for occurrence of TMOs in low-temperature environment." Geochimica et Cosmochimica Acta, 240 173–190. https://doi.org/10.1016/j.gca.2018.08.014.
  • 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. 1999. "Manganese Oxide Minerals: Crystal Structures and Economic and Environmental Significance." In Colloquium on Geology, Mineralogy, and Human Welfare. Smith, J. V., editor. 3447–3454. Washington, D.C.: National Academy of Sciences.
  • 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)." Geochimica et Cosmochimica 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 Refinements of Crystal Structures Using Powder X-ray Diffraction Data." In Modern Powder Diffraction. Bish, D. L. and Post, Jeffrey E., editors. 277–308. Washington, D. C.: Mineralogical Society of America.
  • 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. "(1986) Ionic Modeling of Mineral Structures and Energies in the Electron Gas Approximation: TiO2 Polymorphs, Quartz, Forsterite, Diopside." American Mineralogist, 71 142–150.
  • Post, Jeffrey E. and Burnham, C. W. 1986. "Modeling Tunnel-cation Displacements in Hollandites Using Structure-energy Calculations." American Mineralogist, 71 1178–1185.
  • 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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