Oxygen Vacancy Ordering in Aluminous Bridgmanite in the Earth's Lower Mantle

Autor: Helen Grüninger, Zhaodong Liu, Renée Siegel, Tiziana Boffa Ballaran, Tomoo Katsura, Jürgen Senker, Daniel J. Frost

Publikováno v: Geophysical Research Letters, Vol 46, Iss 15, Pp 8731-8740 (2019)

Abstract Oxygen vacancies (OVs), that charge‐balance the replacement of octahedrally coordinated Si4+ by Al3+ in the mineral bridgmanite, will influence transport properties in the lower mantle but little is known about their stability and local st

Externí odkaz: https://doaj.org/article/90659ba8242a43a5b26927a619afad58

The influence of Al2O3 on the structural properties of MgSiO3 akimotoite

Autor: Nicki C. Siersch, Giacomo Criniti, Alexander Kurnosov, Tiziana Boffa Ballaran, Zhaodong Liu, Takayuki Ishii, Daniel J. Frost, Tony Yu, Yanbin Wang

Publikováno v: American Mineralogist. 108:100-109

Akimotoite, a MgSiO3 polymorph present in the lower transition zone within ultramafic portions of subducting slabs and potentially also in the ambient mantle, will partition some amount of Al, raising the question of how this will affect its crystal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2dfa5af14abcf052ea1f02320e3123e4
https://doi.org/10.2138/am-2022-8257

An experimental investigation of factors controlling the oxygen content of sulphide melts in the Earth’s upper mantle

Autor: Sumith Abeykoon, Vera Laurenz, Daniel J. Frost, Nobuyoshi Miyajima, Catherine McCammon

Publikováno v: Contributions to Mineralogy and Petrology. 178

To determine the factors that control the oxygen content of sulphide melts in the upper mantle, mono-sulphides were equilibrated with mantle peridotite assemblages, with varying FeO and NiO contents, between 3 and 13 GPa and 1300 to 1819 °C. Carbona

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ee423e606a3ef1d5719ced171ae7514
https://doi.org/10.1007/s00410-023-01992-3

Hexagonal Si−Ge Class of Semiconducting Alloys Prepared by Using Pressure and Temperature

Autor: George Serghiou, Gang Ji, Jonathan P. Wright, Reinhard Boehler, Nicholas Odling, Hans J. Reichmann, Monika Koch-Müller, Daniel J. Frost, Wolfgang Morgenroth

Publikováno v: Chemistry-A European Journal
Chemistry-A European Journal, 2021, ⟨10.1002/chem.202102595⟩
Chemistry-A European Journal, Wiley-VCH Verlag, 2021, ⟨10.1002/chem.202102595⟩
Serghiou, G, Odling, N, Reichmann, H J, Ji, G, Koch-Mueller, M, Frost, D J, Wright, J P, Boehler, R & Morgenroth, W 2021, ' Hexagonal Si-Ge Class of Semiconducting Alloys Prepared Using Pressure and Temperature ', Chemistry-A European Journal, vol. 27, no. 57, pp. 14217-14224 . https://doi.org/10.1002/chem.202102595

International audience; Multi-anvil and laser-heated diamond anvil methods areused to subject Ge and Si mixtures to pressures and temperaturesof between 12 and 17 GPa and 1500 – 1800 K, respectively.Synchrotron angle dispersive X-ray diffraction, p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a31a53930ebc241a52d7f2e0257e502
https://doi.org/10.1002/chem.202102595

Compressibilities along the magnetite-magnesioferrite solid solution

Autor: Caterina Melai, Tiziana Boffa-Ballaran, Laura Uenver-Thiele, Alexander Kurnosov, Aleksandr I. Chumakov, Dimitrios Bessas, Daniel J. Frost

In order to calculate the thermodynamic properties for recently discovered high-pressure mixed valence iron-oxides in the system Fe-Mg-O, information on the equation of state of precursor inverse spinel phases along the magnetite-magnesioferrite join

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b206a94ab98ece024860fcdd4b45c797
https://doi.org/10.21203/rs.3.rs-1584538/v1