Low temperature and limited water activity reveal a pathway to magnesite<i>via</i>amorphous magnesium carbonate
Sebastian T. Mergelsberg, Sébastien Kerisit, Eugene S. Ilton, Odeta Qafoku, Christopher J. Thompson, John S. Loring
Abstract
Forsterite carbonated in thin H2O films to magnesite via amorphous magnesium carbonate during reaction with H2O-bearing liquid CO2 at 25 °C. This novel reaction pathway contrasts with previous studies that were carried out at higher H2O activity and temperature, where more highly hydrated nesquehonite was the metastable intermediate.
Topics & Concepts
MagnesiteMagnesiumAmorphous calcium carbonateCarbonateAmorphous solidChemistryChemical engineeringInorganic chemistryGeochemistryMaterials scienceGeologyOrganic chemistryEngineeringCO2 Sequestration and Geologic InteractionsHigh-pressure geophysics and materialsCalcium Carbonate Crystallization and Inhibition