Dr. Georg Spiekermann

Kontakt

Universität Potsdam,
Institut für Geowissenschaften

Dr. Georg Spiekermann
Haus 27, Raum 2.26

E-Mail:
geospiek@uni-potsdam.de
Telefon:
+49 331 977 5836
Fax:
+49 331 977 5700

 

  • Biografie
  • Forschung
  • Lehre
  • Publikationen

Biografie

2016-
Research associate at University of Potsdam, Institute of Earth and Environmental Science, Mineralogy group
2014-2016
Beamline scientist at Deutsches Elektronen-Synchrotron (DESY), PETRA III, inelastic X-ray spectroscopy methods
2012-2014
Staff at Alfred Wegener Institute (AWI), Helmholtz Centre for Polar and Marine Research, operation of the geophysical lab at Neumayer III
2009-2012
PhD at Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences, ab initio modeling of silicate melts
2008
Diploma (Dipl.-Ing.) at Technical University of Berlin (TU Berlin), focus in geophysics and mineralogy

Forschung

My scientific interest focuses on the properties of silicate melts and glasses under conditions relevant to the Earth's mantle. For my research, I make use of ab initio modeling, X-ray diffraction and spectroscopy methods, diamond-anvil cells and laser heating.

Lehre

I teach crystallography, crystal chemistry and experimental mineralogy.

Publikationen

Spiekermann, G. and Harder, M. and Gilmore, K. and Zalden, P. and Sahle, C. J. and Petitgirard, S. and Wilke, M. and Biedermann, N. and Weis, C. and Morgenroth, W. and Tse, J. S. and Kulik, E. and Nishiyama, N. and Yavas, H. and Sternemann, C. (2019) Persistent octahedral coordination in amorphous GeO2 up to 100 GPa revealed by Kb'' X-ray emission spectroscopy. Physical Review X, accepted.

Petitgirard, S. and Sahle, C. and Weis, C: and Gilmore, K. and Spiekermann, G. and Tse, J. S. and Cavallari, C. and Cerantola, V. and Sternemann, C. (2019) Magma properties at Earth's lower mantle conditions inferred from electronic structure and coordination of silica. Geochemical Perspectives Letters, accepted.

Weis, C. and Spiekermann, G. and Sternemann, C. and Harder, M. and Vank\'{o}, G. and Cerantola, V. and Sahle, C. J. and Forov, Y. and Sakrowski, R. and Kupenko, I. and Petitgirard, S. and Yavaş, H. and Bressler, C. and Gawelda, W. and Tolan, M. and Wilke, M. (2019) Combining X-ray Kb1,3, valence-to-core, and X-ray Raman spectroscopy for studying Earth materials at high pressure and temperature: the case of siderite. Journal of Analytical Atomic Spectroscopy. 10.1039/C8JA00247A.

Ketenoglu, D., Spiekermann, G., Harder, M., Oz, E., Koz, C., C. Y. M., Yilmaz, E., Yin, Z., Sahle, C., Detlefs, B., and Yavaş, H. (2018). X-ray Raman spectroscopy of lithium-ion battery electrolyte solutions in a flow cell. Journal of Synchrotron Radiation. 25. 10.1107/S1600577518001662.

Sahle, Christoph & Rosa, Angelika & Rossi, M & Cerantola, Valerio & Spiekermann, G., Petitgirard, Sylvain & Jacobs, Jeroen & Huotari, S & Moretti Sala, M & Mirone, Alessandro. (2017). Direct tomography imaging for inelastic X-ray scattering experiments at high pressure. Journal of Synchrotron Radiation. 24. 10.1107/S1600577516017100.

Weis C., Sternemann C., Cerantola V., Sahle C.J., Spiekermann G., Harder M., Forov Y., Kononov A., Sakrowski R., Yavas H., Tolan M., Wilke M. (2017) Pressure driven spin transition in siderite and magnesiosiderite single crystals. Scientific Reports 7, 16526. DOI:10.1038/s41598-017-16733-3

Petitgirard S., Spiekermann G., Weis C., Sahle C., Sternemann C., Wilke M. (2017) Miniature diamond anvils for X-ray Raman scattering spectroscopy experiments at high pressure. Journal of Synchrotron Radiation, 24. Doi: 10.1107/S1600577516017112

Sahle, C. J., Sternemann, C., Giacobbe, C., Yan, Y. G., Weis, C., Harder, M., Forov, Y., Spiekermann, G., Tolan, M., Krisch, M., Remhof, A., 2016. Formation of CaB6 in the thermal decomposition of the hydrogen storage material Ca(BH4)(2). Physical Chemistry Chemical Physics 18(29):19866-19872. doi:10.1039/c6cp02495e

Spiekermann, G., Wilke, M., Jahn, S., Structural and dynamical properties of supercritical H2O-SiO2 fluids studied by ab initio molecular dynamics, 2016, Chemical Geology 426:85-94, doi: 10.1016/j.chemgeo.2016.01.010

Nyrow, A., Sternemann, C., Tse, J. S., Weis, C., Sahle, C. J., Mende, K., Wieland, D. C. F., Cerantola, V., Gordon, R. A., Spiekermann, G., Regier, T., Wilke, M., Tolan, M., 2016, Bulk sensitive determination of the Fe3+/Fe-Tot-ratio in minerals by Fe L-2/3-edge X-ray Raman scattering, Journal of Analytical Atomic Spectroscopy 31(3):815-820, doi: 10.1039/c5ja00261c

Zitterbart, D. P., Richter, S., Spiekermann, G., Behrens, L. K., Regnery, J., Fontes, R. P., Hänssler, T., König-Langlo, G., Weller, R., Fabry, B., 2014, Are environmental factors responsible for changed breeding behaviour in emperor penguins?, Antarctic Science 26(5): 563-564, doi: 10.1017/S0954102014000285

Spiekermann, G., Steele-MacInnis, M., Kowalski, P. M., Schmidt, C., and Jahn, S., 2013, Vibrational properties of silica species in MgO-SiO2 glasses obtained from ab initio molecular dynamics, Chemical Geology 346:22-33, doi: 10.1016/j.chemgeo.2012.08.020

Spiekermann, G., Steele-MacInnis, M., Kowalski, P. M., Schmidt, C., and Jahn, S., 2012, Vibrational mode frequencies of H4SiO4, D4SiO4, H6Si2O7, and H6Si3O9 in aqueous environment, obtained from ab initio molecular dynamics, Journal of Chemical Physics 137(16): 164506, doi: 10.1063/1.4761824

Spiekermann, G., Steele-MacInnis, M., Schmidt, C., and Jahn, S., 2012, Vibrational mode frequencies of silica species in SiO2-H2O liquids and glasses from ab initio molecular dynamics, Journal of Chemical Physics 136(15):154501, doi: 10.1063/1.3703667

Biografie

2016-
Research associate at University of Potsdam, Institute of Earth and Environmental Science, Mineralogy group
2014-2016
Beamline scientist at Deutsches Elektronen-Synchrotron (DESY), PETRA III, inelastic X-ray spectroscopy methods
2012-2014
Staff at Alfred Wegener Institute (AWI), Helmholtz Centre for Polar and Marine Research, operation of the geophysical lab at Neumayer III
2009-2012
PhD at Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences, ab initio modeling of silicate melts
2008
Diploma (Dipl.-Ing.) at Technical University of Berlin (TU Berlin), focus in geophysics and mineralogy

Forschung

My scientific interest focuses on the properties of silicate melts and glasses under conditions relevant to the Earth's mantle. For my research, I make use of ab initio modeling, X-ray diffraction and spectroscopy methods, diamond-anvil cells and laser heating.

Lehre

I teach crystallography, crystal chemistry and experimental mineralogy.

Publikationen

Spiekermann, G. and Harder, M. and Gilmore, K. and Zalden, P. and Sahle, C. J. and Petitgirard, S. and Wilke, M. and Biedermann, N. and Weis, C. and Morgenroth, W. and Tse, J. S. and Kulik, E. and Nishiyama, N. and Yavas, H. and Sternemann, C. (2019) Persistent octahedral coordination in amorphous GeO2 up to 100 GPa revealed by Kb'' X-ray emission spectroscopy. Physical Review X, accepted.

Petitgirard, S. and Sahle, C. and Weis, C: and Gilmore, K. and Spiekermann, G. and Tse, J. S. and Cavallari, C. and Cerantola, V. and Sternemann, C. (2019) Magma properties at Earth's lower mantle conditions inferred from electronic structure and coordination of silica. Geochemical Perspectives Letters, accepted.

Weis, C. and Spiekermann, G. and Sternemann, C. and Harder, M. and Vank\'{o}, G. and Cerantola, V. and Sahle, C. J. and Forov, Y. and Sakrowski, R. and Kupenko, I. and Petitgirard, S. and Yavaş, H. and Bressler, C. and Gawelda, W. and Tolan, M. and Wilke, M. (2019) Combining X-ray Kb1,3, valence-to-core, and X-ray Raman spectroscopy for studying Earth materials at high pressure and temperature: the case of siderite. Journal of Analytical Atomic Spectroscopy. 10.1039/C8JA00247A.

Ketenoglu, D., Spiekermann, G., Harder, M., Oz, E., Koz, C., C. Y. M., Yilmaz, E., Yin, Z., Sahle, C., Detlefs, B., and Yavaş, H. (2018). X-ray Raman spectroscopy of lithium-ion battery electrolyte solutions in a flow cell. Journal of Synchrotron Radiation. 25. 10.1107/S1600577518001662.

Sahle, Christoph & Rosa, Angelika & Rossi, M & Cerantola, Valerio & Spiekermann, G., Petitgirard, Sylvain & Jacobs, Jeroen & Huotari, S & Moretti Sala, M & Mirone, Alessandro. (2017). Direct tomography imaging for inelastic X-ray scattering experiments at high pressure. Journal of Synchrotron Radiation. 24. 10.1107/S1600577516017100.

Weis C., Sternemann C., Cerantola V., Sahle C.J., Spiekermann G., Harder M., Forov Y., Kononov A., Sakrowski R., Yavas H., Tolan M., Wilke M. (2017) Pressure driven spin transition in siderite and magnesiosiderite single crystals. Scientific Reports 7, 16526. DOI:10.1038/s41598-017-16733-3

Petitgirard S., Spiekermann G., Weis C., Sahle C., Sternemann C., Wilke M. (2017) Miniature diamond anvils for X-ray Raman scattering spectroscopy experiments at high pressure. Journal of Synchrotron Radiation, 24. Doi: 10.1107/S1600577516017112

Sahle, C. J., Sternemann, C., Giacobbe, C., Yan, Y. G., Weis, C., Harder, M., Forov, Y., Spiekermann, G., Tolan, M., Krisch, M., Remhof, A., 2016. Formation of CaB6 in the thermal decomposition of the hydrogen storage material Ca(BH4)(2). Physical Chemistry Chemical Physics 18(29):19866-19872. doi:10.1039/c6cp02495e

Spiekermann, G., Wilke, M., Jahn, S., Structural and dynamical properties of supercritical H2O-SiO2 fluids studied by ab initio molecular dynamics, 2016, Chemical Geology 426:85-94, doi: 10.1016/j.chemgeo.2016.01.010

Nyrow, A., Sternemann, C., Tse, J. S., Weis, C., Sahle, C. J., Mende, K., Wieland, D. C. F., Cerantola, V., Gordon, R. A., Spiekermann, G., Regier, T., Wilke, M., Tolan, M., 2016, Bulk sensitive determination of the Fe3+/Fe-Tot-ratio in minerals by Fe L-2/3-edge X-ray Raman scattering, Journal of Analytical Atomic Spectroscopy 31(3):815-820, doi: 10.1039/c5ja00261c

Zitterbart, D. P., Richter, S., Spiekermann, G., Behrens, L. K., Regnery, J., Fontes, R. P., Hänssler, T., König-Langlo, G., Weller, R., Fabry, B., 2014, Are environmental factors responsible for changed breeding behaviour in emperor penguins?, Antarctic Science 26(5): 563-564, doi: 10.1017/S0954102014000285

Spiekermann, G., Steele-MacInnis, M., Kowalski, P. M., Schmidt, C., and Jahn, S., 2013, Vibrational properties of silica species in MgO-SiO2 glasses obtained from ab initio molecular dynamics, Chemical Geology 346:22-33, doi: 10.1016/j.chemgeo.2012.08.020

Spiekermann, G., Steele-MacInnis, M., Kowalski, P. M., Schmidt, C., and Jahn, S., 2012, Vibrational mode frequencies of H4SiO4, D4SiO4, H6Si2O7, and H6Si3O9 in aqueous environment, obtained from ab initio molecular dynamics, Journal of Chemical Physics 137(16): 164506, doi: 10.1063/1.4761824

Spiekermann, G., Steele-MacInnis, M., Schmidt, C., and Jahn, S., 2012, Vibrational mode frequencies of silica species in SiO2-H2O liquids and glasses from ab initio molecular dynamics, Journal of Chemical Physics 136(15):154501, doi: 10.1063/1.3703667