Search Results - "H. Marquardt"

Evidence for a Fe3+-rich pyrolitic lower mantle from (Al,Fe)-bearing bridgmanite elasticity data by Kurnosov, A., Marquardt, H., Frost, D. J., Ballaran, T. Boffa, Ziberna, L.

“…The authors report single-crystal elasticity data on (Al,Fe)-bearing bridgmanite and show that its elastic behaviour is markedly different from that of the…”
Get full text

Ferropericlase Control of Lower Mantle Rheology: Impact of Phase Morphology by M. Thielmann, G. J. Golabek, H. Marquardt

“…Abstract The rheological properties of Earth's lower mantle play a key role for global mantle dynamics. The mineralogy of the lower mantle can be approximated…”
Get full text

Weak cubic CaSiO3 perovskite in the Earth’s mantle by Immoor, J., Miyagi, L., Liermann, H.-P., Speziale, S., Schulze, K., Buchen, J., Kurnosov, A., Marquardt, H.

“…Cubic CaSiO 3 perovskite is a major phase in subducted oceanic crust, where it forms at a depth of about 550 kilometres from majoritic garnet 1 , 2 , 28 …”
Get full text

Elastic Softening of (Mg0.8Fe0.2)O Ferropericlase Across the Iron Spin Crossover Measured at Seismic Frequencies by Marquardt, H., Buchen, J., Mendez, A. S. J., Kurnosov, A., Wendt, M., Rothkirch, A., Pennicard, D., Liermann, H.‐P.

“…We experimentally determined the bulk modulus of (Mg0.8Fe0.2)O ferropericlase across the iron spin transition and in the low‐spin phase by employing a new…”
Get full text

High pressure and high temperature Brillouin scattering measurements of pyrope single crystals using flexible CO2 laser heating systems by Kurnosov, A., Criniti, G., Boffa Ballaran, T., Marquardt, H., Frost, D. J.

“…Single-crystal Brillouin scattering measurements are important for interpreting seismic velocities within the Earth and other planetary interiors. These…”
Get full text

Iron Content‐Dependence of Ferropericlase Elastic Properties Across the Spin Crossover From Novel Experiments and Machine Learning by Trautner, V. E., Rijal, A., Plueckthun, C., Satta, N., Koemets, E., Buchen, J., Wang, B., Glazyrin, K., Cobden, L., Marquardt, H.

“…The iron spin crossover in (Mg1‐xFex)O ferropericlase causes changes to its physical properties that are expected to affect seismic velocities in Earth's lower…”
Get full text

From Shell Midden to Midden-Mound: The Geoarchaeology of Mound Key, an Anthropogenic Island in Southwest Florida, USA by Thompson, Victor D, Marquardt, William H, Cherkinsky, Alexander, Roberts Thompson, Amanda D, Walker, Karen J, Newsom, Lee A, Savarese, Michael

“…Mound Key was once the capital of the Calusa Kingdom, a large Pre-Hispanic polity that controlled much of southern Florida. Mound Key, like other…”
Get full text

Evidence for {100} slip in ferropericlase in Earth's lower mantle from high-pressure/high-temperature experiments by Immoor, J., Marquardt, H., Miyagi, L., Lin, F., Speziale, S., Merkel, S., Buchen, J., Kurnosov, A., Liermann, H.-P.

“…Seismic anisotropy in Earth's lowermost mantle, resulting from Crystallographic Preferred Orientation (CPO) of elastically anisotropic minerals, is among the…”
Get full text

Kurnosov et al. reply by Kurnosov, A., Marquardt, H., Frost, D. J., Ballaran, T. Boffa, Ziberna, L.

“…In our Letter1, we measured single-crystal X-ray diffraction of the crystal platelets at each pressure and therefore we know the unit cell volume and the exact…”
Get full text

Phase transition kinetics of superionic H2O ice phases revealed by Megahertz X-ray free-electron laser-heating experiments by Husband, R. J., Liermann, H. P., McHardy, J. D., McWilliams, R. S., Goncharov, A. F., Prakapenka, V. B., Edmund, E., Chariton, S., Konôpková, Z., Strohm, C., Sanchez-Valle, C., Frost, M., Andriambariarijaona, L., Appel, K., Baehtz, C., Ball, O. B., Briggs, R., Buchen, J., Cerantola, V., Choi, J., Coleman, A. L., Cynn, H., Dwivedi, A., Graafsma, H., Hwang, H., Koemets, E., Laurus, T., Lee, Y., Li, X., Marquardt, H., Mondal, A., Nakatsutsumi, M., Ninet, S., Pace, E., Pepin, C., Prescher, C., Stern, S., Sztuk-Dambietz, J., Zastrau, U., McMahon, M. I.

“…H 2 O transforms to two forms of superionic (SI) ice at high pressures and temperatures, which contain highly mobile protons within a solid oxygen sublattice…”
Get full text

Author Correction: Evidence for a Fe3+-rich pyrolitic lower mantle from (Al,Fe)-bearing bridgmanite elasticity data by Kurnosov, A., Marquardt, H., Frost, D. J., Ballaran, T. Boffa, Ziberna, L.

“…In Extended Data Table 1 of this Letter, some of the elastic constants were reported incorrectly. This occurred as a result of an error in the script used to…”
Get full text

Polyetheretherketone—cytotoxicity and mutagenicity in vitro by Katzer, A, Marquardt, H, Westendorf, J, Wening, J.V, von Foerster, G

“…The results of the incubation of polyetheretherketone (PEEK) fibre material with seven different genotype variants of salmonella bacterium showed with and…”
Get full text

Novel experimental setup for megahertz X‐ray diffraction in a diamond anvil cell at the High Energy Density (HED) instrument of the European X‐ray Free‐Electron Laser (EuXFEL) by Liermann, H. P., Konôpková, Z., Appel, K., Prescher, C., Schropp, A., Cerantola, V., Husband, R. J., McHardy, J. D., McMahon, M. I., McWilliams, R. S., Pépin, C. M., Mainberger, J., Roeper, M., Berghäuser, A., Damker, H., Talkovski, P., Foese, M., Kujala, N., Ball, O. B., Baron, M. A., Briggs, R., Bykov, M., Bykova, E., Chantel, J., Coleman, A. L., Cynn, H., Dattelbaum, D., Dresselhaus-Marais, L. E., Eggert, J. H., Ehm, L., Evans, W. J., Fiquet, G., Frost, M., Glazyrin, K., Goncharov, A. F., Hwang, H., Jenei, Zs, Kim, J.-Y., Langenhorst, F., Lee, Y., Makita, M., Marquardt, H., McBride, E. E., Merkel, S., Morard, G., O'Bannon, E. F., Otzen, C., Pace, E. J., Pelka, A., Pigott, J. S., Prakapenka, V. B., Redmer, R., Sanchez-Valle, C., Schoelmerich, M., Speziale, S., Spiekermann, G., Sturtevant, B. T., Toleikis, S., Velisavljevic, N., Wilke, M., Yoo, C.-S., Baehtz, C., Zastrau, U., Strohm, C.

“…The high‐precision X‐ray diffraction setup for work with diamond anvil cells (DACs) in interaction chamber 2 (IC2) of the High Energy Density instrument of the…”
Get full text

Open letter to the European commission: scientifically unfounded precaution drives European commission’s recommendations on EDC regulation, while defying common sense, well-established science, and risk assessment principles by Dietrich, Daniel, von Aulock, Sonja, Marquardt, H. W. J., Blaauboer, Bas J., Dekant, Wolfgang, Kehrer, James, Hengstler, Jan G., Collier, Abby C., Gori, Gio Batta, Pelkonen, Olavi, Lang, Florian, Nijkamp, Frans P., Stemmer, Kerstin, Li, Albert, Savolainen, Kai, Hayes, A. Wallace, Gooderham, Nigel, Harvey, Alan

Get full text

Multi-sample loading technique for comparative physical property measurements in the diamond-anvil cell by Schulze, K., Buchen, J., Marquardt, K., Marquardt, H.

“…We present a method to perform improved measurements of the effects of chemical variability on physical properties of single-crystal samples in the…”
Get full text

Role of iron-spin transition in ferropericlase on seismic interpretation: A broad thermochemical transition in the mid mantle? by Cammarano, F., Marquardt, H., Speziale, S., Tackley, P. J.

“…Most of the lower mantle is relatively simple in terms of seismic structure. Lateral variations are weaker compared to its bottom part and to the upper mantle…”
Get full text

Elastic properties of MgO nanocrystals and grain boundaries at high pressures by Brillouin scattering by Marquardt, H., Gleason, A., Marquardt, K., Speziale, S., Miyagi, L., Neusser, G., Wenk, H.-R., Jeanloz, R.

Get full text

Broad Elastic Softening of (Mg,Fe)O Ferropericlase Across the Iron Spin Crossover and a Mixed‐Spin Lower Mantle by Méndez, A. S. J., Stackhouse, S., Trautner, V., Wang, B., Satta, N., Kurnosov, A., Husband, R. J., Glazyrin, K., Liermann, H.‐P., Marquardt, H.

“…The elastic bulk modulus softening of (Mg,Fe)O ferropericlase across the iron spin crossover induces dramatic changes in its physical properties, including…”
Get full text

Patty Jo Watson, distinguished anthropological archaeologist (1932–2024) by Levy, Janet E., Marquardt, William H., Stein, Julie K.

Get full text

Anomalous sound velocities in polycrystalline MgO under non-hydrostatic compression by Gleason, A. E., Marquardt, H., Chen, B., Speziale, S., Wu, J., Jeanloz, R.

“…Brillouin scattering from polycrystalline MgO (periclase) non‐hydrostatically compressed to, and decompressed from, 60 GPa at room temperature documents shear‐…”
Get full text