Structural evolution of amorphous calcium sulfate nanoparticles into crystalline gypsum phase,CrystEngComm

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Structural evolution of amorphous calcium sulfate nanoparticles into crystalline gypsum phase
CrystEngComm ( IF 2.6 ) Pub Date : 2020-09-10 , DOI: 10.1039/d0ce01173h
Caiyun Jia _{1,

2,

3,

4,

5} , Luchao Wu _{1,

2,

3,

4} , Qiaoshan Chen _{1,

2,

3,

4} , Peng Ke _{1,

2,

3,

4} , James J. De Yoreo _{5,

6,

7,

8,

9} , Baohong Guan _{1,

2,

3,

4,

10}

Affiliation

The involvement of amorphous calcium sulfate (ACS) as a precursor to calcium sulfate crystallization remains an important but poorly understood phenomenon, especially the mechanism by which ACS evolves into crystalline phase. Here, we captured the ACS nanoparticles as a precursor to calcium sulfate crystallization in a concentrated CaCl₂ solution at 90 °C and observed several stages of its evolution. The ACS nanoparticles grew by simultaneous fusion and internal structural evolution. Aggregation of the ACS nanoparticles gave birth to bulk ACS particles within which nanocrystalline domains sprouted and developed into crystalline gypsum. This work deepens the understanding of the evolution of ACS nanoparticles and its role in multistage crystallization of calcium sulfate.

中文翻译：

无定形硫酸钙纳米粒子向结晶石膏相的结构演化

无定形硫酸钙（ACS）作为硫酸钙结晶前体的参与仍然是重要但尚不为人所知的现象，尤其是ACS演变成结晶相的机制。在这里，我们捕获了ACS纳米颗粒，作为硫酸钙在90°C的浓CaCl ₂溶液中结晶的前体，并观察了其演化的几个阶段。ACS纳米粒子通过同时融合和内部结构演变而生长。ACS纳米粒子的聚集催生了块状ACS粒子，其中纳米晶域发芽并发展为结晶石膏。这项工作加深了对ACS纳米粒子的演变及其在硫酸钙多阶段结晶中的作用的了解。

更新日期：2020-10-06

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