Synthesis of binary transition metal nitrides, carbides and borides from the elements in the laser-heated diamond anvil cell and their structure-property relations

A Friedrich, B Winkler, EA Juarez-Arellano… - Materials, 2011 - mdpi.com
Transition metal nitrides, carbides and borides have a high potential for industrial
applications as they not only have a high melting point but are generally harder and less …

Brillouin scattering and its application in geosciences

S Speziale, H Marquardt… - Reviews in Mineralogy …, 2014 - pubs.geoscienceworld.org
Brillouin spectroscopy is an optical technique that allows one to determine the directional
dependence of acoustic velocities in minerals and materials subject to a wide range of …

Evidence for a Fe3+-rich pyrolitic lower mantle from (Al,Fe)-bearing bridgmanite elasticity data

A Kurnosov, H Marquardt, DJ Frost, TB Ballaran… - Nature, 2017 - nature.com
The chemical composition of Earth's lower mantle can be constrained by combining
seismological observations with mineral physics elasticity measurements,,. However, the …

High-pressure single-crystal elasticity of wadsleyite and the seismic signature of water in the shallow transition zone

J Buchen, H Marquardt, S Speziale, T Kawazoe… - Earth and Planetary …, 2018 - Elsevier
Earth's transition zone at depths between 410 km and 660 km plays a key role in Earth's
deep water cycle since large amounts of hydrogen can be stored in the nominally anhydrous …

Seismically invisible water in Earth's transition zone?

K Schulze, H Marquardt, T Kawazoe… - Earth and Planetary …, 2018 - Elsevier
Ringwoodite, the dominant mineral at depths between 520 km and 660 km, can store up to 2–
3 wt.% of water in its crystal structure, making the Earth's transition zone a plausible water …

The structure and composition of olivine grain boundaries: 40 years of studies, status and current developments

K Marquardt, UH Faul - Physics and Chemistry of Minerals, 2018 - Springer
Interfaces in rocks, especially grain boundaries in olivine dominated rocks, have been
subject to about 40 years of studies. The grain boundary structure to property relation is …

SR-FTIR microscopy and FTIR imaging in the Earth Sciences

G Della Ventura, A Marcelli… - … in Mineralogy and …, 2014 - pubs.geoscienceworld.org
Infrared spectroscopy was developed at the beginning of the 20th century for analytical
chemical purposes and it is remarkable that the first contribution of the first issue of Physical …

Strong Effect of Stress on the Seismic Signature of the Post‐Stishovite Phase Transition in the Earth's Lower Mantle

B Wang, J Buchen, ASJ Méndez… - Geophysical …, 2023 - Wiley Online Library
The stishovite to post‐stishovite phase transition may modify the scattering of seismic waves
by stishovite‐bearing rocks in the Earth's lower mantle. A series of continuous compression …

Equation of state of polycrystalline stishovite across the tetragonal‐orthorhombic phase transition

J Buchen, H Marquardt, K Schulze… - Journal of …, 2018 - Wiley Online Library
High‐pressure silica polymorphs may contribute to lithologies in Earth's lower mantle.
Stishovite, the tetragonal rutile‐type polymorph of SiO2, distorts to an orthorhombic CaCl2 …

Single crystal synthesis of δ-(Al, Fe) OOH

T Kawazoe, I Ohira, T Ishii, T Boffa Ballaran… - American …, 2017 - degruyter.com
Single crystals of δ-AlOOH, δ-(Al0. 953, Fe0. 047) OOH, and δ-(Al0. 878, Fe0. 122) OOH
with dimensions up to~ 0.4–0.6 mm were synthesized by the high-pressure hydrothermal …