G
Guillaume Fiquet
Researcher at University of Paris
Publications - 123
Citations - 8561
Guillaume Fiquet is an academic researcher from University of Paris. The author has contributed to research in topics: Mantle (geology) & Diamond anvil cell. The author has an hindex of 49, co-authored 119 publications receiving 7771 citations. Previous affiliations of Guillaume Fiquet include École normale supérieure de Lyon & Institut de Physique du Globe de Paris.
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Journal ArticleDOI
Iron partitioning in Earth's Mantle: Toward a deep lower mantle discontinuity
James Badro,Guillaume Fiquet,François Guyot,Jean-Pascal Rueff,Viktor V. Struzhkin,György Vankó,Giulio Monaco +6 more
TL;DR: A high-spin to low-spin transition occurring in the 60- to 70-gigapascal pressure range, corresponding to depths of 2000 kilometers in Earth's lower mantle, implies that the partition coefficient of iron between ferropericlase and magnesium silicate perovskite, the two main constituents of the lower mantle), may increase by several orders of magnitude.
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Synthesis of superhard cubic BC2N
TL;DR: Cubic BC2N was synthesized from graphite-like cubic boron nitride (BC2N) at pressures above 18 GPa and temperatures higher than 2200 K as discussed by the authors.
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Synthesis and characterization of a binary noble metal nitride
Eugene Gregoryanz,Chrystele Sanloup,Maddury Somayazulu,James Badro,Guillaume Fiquet,Ho-kwang Mao,Russell J. Hemley +6 more
TL;DR: The discovery and characterization of platinum nitride (PtN), the first binary nitride of the noble metals group, is reported, characterized by a very high Raman-scattering cross-section with easily observed second- and third-order Raman bands.
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Electronic transitions in perovskite: possible nonconvecting layers in the lower mantle.
TL;DR: The proportion of iron in the low spin state grows with depth, increasing the transparency of the mantle in the infrared region, with a maximum at pressures consistent with the D″ layer above the core-mantle boundary, which suggests the existence of nonconvecting layers in the lowermost mantle.
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Melting of Peridotite to 140 Gigapascals
Guillaume Fiquet,Anne-Line Auzende,Julien Siebert,Alexandre Corgne,Alexandre Corgne,Hélène Bureau,Haruka Ozawa,Haruka Ozawa,Gaston Garbarino +8 more
TL;DR: Melting phase relations and element partitioning data show that these liquids could host many incompatible elements at the base of the mantle, such that seismically anomalous zones near the boundary between the core and the mantle may result from isolated pockets of melt.