Comment on "Hydromagnesite solubility product and growth kinetics in aqueous solution from 25 to 75 °C" by Gautier, Q., Benezeth, P., Mavromatis, V., and Schott, J. (15th September 2017)

• Record Type: Journal Article
• Authors: Xiong, Yongliang
• Is Part Of: Geochimica et cosmochimica acta. Volume 213(2017)
• Page Start: 677
• Page End: 680
• Publication Date: 2017-09-15
• Subjects: Brucite -- CO2 sequestration -- Carbonation of ultrabasic and basic rocks -- MgAl alloys atmospheric corrosion -- MgO–CO2–H2O system -- Alkaline solutions -- Nuclear waste management; Geochemistry -- Periodicals; Meteorites -- Periodicals; Géochimie -- Périodiques; Météorites -- Périodiques; Geochemie; Astrochemie; Electronic journals; 551.905
• DOI: 10.1016/j.gca.2016.04.013
• Languages: English
• ISSNs: 0016-7037

Abstract

Abstract: Gautier et al. (2014) recently published their determination of hydromagnesite solubility constant and hydromagnesite growth kinetics. Although their raw data appear to be of high quality, there is an oversight in their calculations of the hydromagnesite solubility constants given the solution compositions in their experiments. The oversight lies in the fact that they did not consider the constraint of simultaneous equilibrium with brucite. This oversight causes their newly calculated equilibrium constant for hydromagnesite to be discordant with the literature values (Königsberger et al., 1992; Xiong, 2011).