Transformation of boehmite into 2:1 type layered aluminosilicates with different layer charges under hydrothermal conditions
Transformation of boehmite into 2:1 type layered aluminosilicates with different layer charges under hydrothermal conditions
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水热条件下勃姆石向不同层电荷的2:1型层状铝硅酸盐的转变
DOI：
10.1016/j.clay.2019.105207
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发表时间：
2019-11
影响因子：
5.6
通讯作者：
Zhu Jianxi
中科院分区：
文献类型：
--
作者：
Li Shangying;He Hongping;Tao Qi;Xi Yunfei;Chen Aiqing;Ji Shichao;Zhang Chaoqun;Yang Yiping;Zhu Jianxi
本研究以薄水铝石为前驱体，在水热条件下合成了beidellite、paragonite等具有高层电荷的2:1型层状铝硅酸盐（2:1型la - hplc）。薄水铝石前驱体中溶解铝的浓度对热液产物的矿物组成和所得矿物的层电荷密度有重要影响。在较高的溶解Al浓度下，形成了2:1型la - hplc、paragonite和少量beidellite的组合，而在较低的溶解Al浓度下，形成了含有少量2:1型la - hplc的beidellite。乙二醇处理后，所得2:1型la - hplc的溶胀能力较差。HRTEM和EDS分析表明，2:1型层状硅铝酸盐（2:1型LA）的晶格条纹（001）面与薄水铝石（020）方向平行。薄水铝石成功转化为2:1型LA，为更好地理解地质过程中2:1型LA的形成提供了思路，并为合成不同层电荷的2:1型LA提供了简便的制备方法。
In this study, beidellite, paragonite and other 2:1 type layered aluminosilicates with high layer charges (2:1 type LA-HLC) were synthesized under hydrothermal conditions by using boehmite as a precursor. The concentrations of dissolved Al from boehmite precursor had important effects on the mineral components of the hydrothermal products and the layer charge density of the resultant minerals. A combination of 2:1 type LA-HLC, paragonite, and minor beidellite formed at a relatively high concentration of dissolved Al, while beidellite with a small amount of 2:1 type LA-HLC was produced at a low concentration of dissolved Al. The resultant 2:1 type LA-HLC exhibited poor swelling ability when treated with ethylene glycol. A solid-state transformation mechanism was proposed for the transformation based on the HRTEM images and EDS analyses, which showed that lattice fringes representing (001) faces of 2:1 type layered aluminosilicates (2:1 type LA) were parallel to the (020) direction of boehmite. The successful transformation of boehmite into 2:1 type LA provides insights to well understand the formation of 2:1 type LA in geological processes and offer a facile preparation approach for the synthesis of 2:1 type LA with different layer charges.
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影响因子：
3.1
作者：
J. Cuadros;S. Altaner
通讯作者：
J. Cuadros;S. Altaner
影响因子：
2.2
作者：
J. T. Kloprogge;J. Jansen;J. Geus
通讯作者：
J. T. Kloprogge;J. Jansen;J. Geus
影响因子：
1.5
作者：
H. He;J. G. Guo;J. Zhu;C. Hu
通讯作者：
H. He;J. G. Guo;J. Zhu;C. Hu
影响因子：
2.2
作者：
Lori Bettison-Varga;I. Mackinnon
通讯作者：
Lori Bettison-Varga;I. Mackinnon
影响因子：
5
作者：
K. Marumo;K. Hattori
通讯作者：
K. Marumo;K. Hattori