Low temperature and limited water activity reveal a pathway to magnesite via amorphous magnesium carbonate†
Sebastian T.
Mergelsberg, 
a
Sebastien N.
Kerisit,
a
Eugene S.
Ilton,
a
Odeta
Qafoku,
b
Christopher J.
Thompson
c
and
John S.
Loring
*a
a
Sebastien N.
Kerisit,
a
Eugene S.
Ilton,
a
Odeta
Qafoku,
b
Christopher J.
Thompson
c
and
John S.
Loring
*a
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.
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