Phase transformation-induced Mg isotope fractionation in Mgmediated CaCO_(3)mineralization  

作　　者：Yi-Ming Ju Fang Huang Xin Ding Li-Bo Mao Shu-Hong Yu 

机构地区：[1]Department of Chemistry,Institute of Biomimetic Materials&Chemistry,Anhui Engineering Laboratory of Biomimetic Materials,Division of Nanomaterials&Chemistry,Hefei National Research Center for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China [2]CAS Key Laboratory of Crust-Mantle Materials and Environments,School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China [3]CAS Center for Excellence in Comparative Planetology,University of Science and Technology of China,Hefei 230026,China

出　　处：《Nano Research》2023年第2期3597-3602,共6页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.U1932213,51732011,and 21701161);the National Key Research and Development Program of China(Nos.2018YFE0202201 and 2021YFA0715700);Science and Technology Major Project of Anhui Province(No.201903a05020003);the University Synergy Innovation Program of Anhui Province(No.GXXT-2019-028).

摘　　要：The biomineralization of CaCO_(3)often involves the transformation of amorphous precursors into crystalline phases,which is regulated by various proteins and inorganic ions such as Mg^(2+)ions.While the effects of Mg^(2+)ions on the polymorph and shape of the crystalline CaCO_(3)have been observed and studied,the interplay between Mg^(2+)ions and CaCO_(3)during the mineralization remains unclear.This work focuses on the mechanism of Mg^(2+)ion-regulated mineralization of CaCO_(3).By tracing the Mg isotope fractionation,the different mineralization pathways of CaCO_(3)under different Mg^(2+)ion concentrations had been clarified.Detailed regulatory role of Mg^(2+)ions at the different stages of mineralization had been proposed through combining the fractionation data with the analyses of the CaCO_(3)polymorph and shape evolution.These results provide a clear view of the Mg-mediated crystallization process of amorphous CaCO_(3),which can be used to finely control the phase of the crystalline products according to different needs.

关 键 词：MINERALIZATION calcium carbonate MAGNESIUM isotope fractionation 

分 类 号：TB383[一般工业技术—材料科学与工程]