Multivariate study of the dynamics of CO2 reaction with brucite-rich ultramafic mine tailings

⿢Ambient carbonation of mining residues monitored in laboratory conditions.⿢Carbonate nucleation of non-carbonated ores is a limiting step.⿢Ores seeded with carbonates exhibited faster reactivity.⿢Flakes of a meta-stable porous hydrated carbonates form in early carbonation.⿢Flakes are then replaced by denser layers of elongated nesquehonite crystals.