Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses.

ABSTRACT: Mineral trapping through the precipitation of carbonate minerals is a potential approach to reduce CO₂ accumulation in the atmosphere. The temperature dependence of amorphous magnesium carbonate (AMC), a precursor of crystalline magnesium carbonate hydrates, was investigated using synchrotron X-ray scattering experiments with atomic pair distribution function (PDF) and X-ray absorption fine structure analysis. PDF analysis revealed that there were no substantial structural differences among the AMC samples synthesized at 20, 60, and 80 °C. In addition, the medium-range order of all three AMC samples was very similar to that of hydromagnesite. Stirring in aqueous solution at room temperature caused the AMC sample to hydrate immediately and form a three-dimensional hydrogen-bondin

SUBMITTER: Yamamoto GI 

PROVIDER: S-EPMC8613255 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature