Magnesium and calcium carbonate minerals are significant reservoirs of Earth's carbon and understanding their behavior under different conditions is crucial for elucidating the mechanisms of deep carbon storage. Huntite, MgCa(CO), is one of the two stable calcium magnesium carbonate phases, together with dolomite. The distinctive cation coordination environment of Ca atoms compared to calcite-type and dolomite structures makes huntite a comparatively less dense phase.
View Article and Find Full Text PDFWe have synthesized the first hydrous sp-carbonate by laser-heating Ba[CO], CO and HO in a diamond anvil cell at 40(3) GPa. The crystal structure of Ba[HCO][HCO][HCO][HCO] was determined by synchrotron single crystal X-ray diffraction. The experiments were complemented by DFT-based calculations.
View Article and Find Full Text PDFAn entire series of mercury cyanamides/carbodiimides, including two new materials─Hg(NCN)Cl (, = 4, = 9.109(1) Å, = 15.386(1) Å, = 8.
View Article and Find Full Text PDFWe synthesized an iron carbonate, Fe[CO], by reacting FeO with CO at high temperatures and pressures of approximately 33(3) GPa. The structure was solved by single-crystal X-ray diffraction. Full geometry optimizations based on density functional theory reproduced the crystal structure.
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