Anomalously low activation energy of nanoconfined MgCO3 precipitation.

Authors :: Miller, Quin R. S.
Kaszuba, John P.
Schaef, Herbert T.
Bowden, Mark E.
McGrail, B. Peter
Rosso, Kevin M.
Source :: Chemical Communications; 6/18/2019, Vol. 55 Issue 48, p6835-6837, 3p
Publication Year :: 2019
Abstract: Magnesite (MgCO<subscript>3</subscript>) precipitation within the nanoconfined space of adsorbed H<subscript>2</subscript>O films (∼5 monolayers) was determined to have an apparent activation energy of only 36 ± 6 kJ mol<superscript>−1</superscript>, suggesting that Mg<superscript>2+</superscript> under nanoconfinement adopts a hydration configuration that mimics that of aqueous Ca<superscript>2+</superscript>, at least energetically, if not also specifically in hydration structure. [ABSTRACT FROM AUTHOR]