Formation of nano-magnesite in the calcareous spicules prepared under ambient conditions
Journal
Chemical Communications
Journal Volume
56
Journal Issue
51
Pages
6925-6928
Date Issued
2020
Author(s)
Abstract
We report that high-Mg calcite spherulites can undergo a coarsening process to form calcareous spicules of ∼30 microns in width and several hundred microns in length after an aging process in air for a prolonged period. During the aging process, the crystallinity of the calcitic structure has been improved substantially with a significant migration of Mg ions toward the mineral surface. In a thin-foil sample of the spicule aged for 20 months, nanocrystallites of magnesite with minor substitution level of Ca ions have been found near the surface of the spicule.
SDGs
Type
journal article