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In Vitro Synthesis of High Mg Calcite under Ambient Conditions and Its Implication for Biomineralization Process
Long, Xia; Ma, Yurong; Qi, Limin
2011-07-01
Source PublicationCRYSTAL GROWTH & DESIGN
ISSN1528-7483
Volume11Issue:7Pages:2866-2873
AbstractInstead of calcite or aragonite, thermodynamically unstable magnesium-bearing calcite occurs in many marine organisms such as sea urchin, sea star, corallina algae, and so on. However, the formation process of biogenic high-magnesium calcite has been an enigma. In this work, high-magnesium calcite in pure phase was synthesized in large yield via polymer-stabilized amorphous calcium magnesium carbonate (ACMC) precursors under mild conditions for the first time. The magnesium contents in Mg-bearing calcite can be exquisitely tuned from 15 to 40 mol % by changing the Mg/Ca ratio in mother solutions. We found appropriate polymer concentration windows for the synthesis of pure phase high Mg-calcite under defined crystallization conditions. It is proposed that the role of dextran sulfate sodium salt was to restrain the formation of aragonite, and the main role of poly(acrylic acid) was to stabilize ACMC. In this work, we designed a strategy to prepare thermodynamically unstable high Mg-calcite; that is, the preparation of polymer-stabilized precursor phase and the crystallization process were separated into two steps. This strategy might be extended to the synthesis of other thermodynamically unstable phases. The in vitro fabrication of pure high-magnesium calcite may give some indirect clues to the formation mechanism of biogenic Mg-calcite.
DOI10.1021/cg200028x
Indexed BySCI
Language英语
WOS IDWOS:000292417200029
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72806
Collection中国科学院化学研究所
Corresponding AuthorMa, Yurong
AffiliationPeking Univ, Coll Chem, State Key Lab Struct Chem Unstable & Stable Speci, BNLMS, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Long, Xia,Ma, Yurong,Qi, Limin. In Vitro Synthesis of High Mg Calcite under Ambient Conditions and Its Implication for Biomineralization Process[J]. CRYSTAL GROWTH & DESIGN,2011,11(7):2866-2873.
APA Long, Xia,Ma, Yurong,&Qi, Limin.(2011).In Vitro Synthesis of High Mg Calcite under Ambient Conditions and Its Implication for Biomineralization Process.CRYSTAL GROWTH & DESIGN,11(7),2866-2873.
MLA Long, Xia,et al."In Vitro Synthesis of High Mg Calcite under Ambient Conditions and Its Implication for Biomineralization Process".CRYSTAL GROWTH & DESIGN 11.7(2011):2866-2873.
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