The main products of the Olivine reaction with water and carbonic acid are magnesium carbonate (MgCO3), iron oxides, silicic acid (H4SiO4), and bicarbonate ions (HCO3-). The reaction can be summarized as follows:
Olivine reacts with water and carbon dioxide to form magnesium carbonate and iron oxides. This reaction is part of the serpentinization process, where olivine is converted into serpentine minerals. The reaction can be represented as: [ \text{(Mg,Fe)}_2\text{SiO}_4 + \text{CO}_2 + \text{H}_2\text{O} \rightarrow \text{MgCO}_3 + \text{Fe}_2\text{O}_3 + \text{SiO}_2 ]
Carbon dioxide reacts with water to form carbonic acid, which then attacks the olivine surface and dissolves it. The reaction products are silicic acid, magnesium ions, and bicarbonate ions.
The carbonation of olivine can lead to a powdery product containing high carbonate content, with the main products being quasi-amorphous colloidal silica and magnesium carbonate.
These reactions are important for understanding the weathering of rocks and the carbon cycle, as well as for potential applications in carbon capture and storage to mitigate climate change. For more detailed information, you can refer to scientific articles such as "Olivine reactivity with CO2 and H2O on a microscale" [1], "Water and carbon dioxide adsorption at olivine surfaces" [2], and "How much carbon dioxide can be removed from the atmosphere if ..." [3].
Sources: [1] Olivine reactivity with CO2 and H2O on a microscale [2] Water and carbon dioxide adsorption at olivine surfaces [3] How much carbon dioxide can be removed from the atmosphere if ...