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Iron-rich Fe-O compounds with closest-packed layers at core pressures
Jin Liu, Yang Sun, Chaojia Lv +7
Oxygen solubility in solid iron is extremely low, even at high pressures and temperatures. Thus far, no Fe-O compounds between Fe and FeO endmembers have been reported experimental…
Synthesis and structure of carbon doped H3S compounds at high pressure
Alexander F. Goncharov, Elena Bykova, Maxim Bykov +4
Understanding of recently reported putative close-to-room-temperature superconductivity in C-S-H compounds at 267 GPa demands reproducible synthesis protocol as well as knowledge o…
Ethane and methane at high pressures: structure and stability
Elissaios Stavrou, Alexander A. Maryewski, Sergey Lobanov +4
We have performed a combined experimental and theoretical study of ethane and methane at high pressures up to 120 GPa at 300 K using x-ray diffraction and Raman spectroscopy and th…
High-Pressure Na3(N2)4, Ca3(N2)4, Sr3(N2)4, and Ba(N2)3 Featuring Nitrogen Dimers with Non-Integer Charges and Anion-Driven Metallicity
Dominique Laniel, Bjoern Winkler, Timofey Fedotenko +12
Charged nitrogen dimers are ubiquitous in high-pressure binary metal-nitrogen systems. They are known to possess integer formal charges x varying from one through four. Here, we pr…
X-ray Diffraction and Equation of State of the C-S-H Room-Temperature Superconductor
Anmol Lamichhane, Ravhi Kumar, Muhtar Ahart +10
X-ray diffraction indicates that the structure of the recently discovered room temperature carbonaceous sulfur hydride (C-S-H) superconductor is derived from previously established…
Ultra-high pressure disordered eight-coordinated phase of MgGeO: Analogue for super-Earth mantles
Rajkrishna Dutta, Sally J. Tracy, Ronald E. Cohen +9
Mg2GeO4 is an analogue for the ultra-high pressure behavior of Mg2SiO4, so we have investigated magnesium germanate to 275 GPa and over 2000 K using a laser-heated diamond anvil ce…