河北灵寿蛭石晶体化学特征与层间水化行为  

The crystal chemical characteristics and interlaminar hydration behavior of the vermiculite in Lingshou County, Hebei Province, China

作　　者：苏小丽 吴逍 陈情泽[1] 马灵涯 梁晓亮[1] 陶奇[1] 朱建喜[1] 何宏平[1,3] SU Xiao-li;WU Xiao;CHEN Qing-ze;MA Ling-ya;LIANG Xiao-liang;TAO Qi;ZHU Jian-xi;HE Hong-ping(Guangdong Provincial Key Laboratory of Mineral Physics and Material/CAS Key Laboratory of Mineralogy and Metallogeny,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;School of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333001,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院广州地球化学研究所矿物学与成矿学重点实验室/广东省矿物物理与材料研究开发重点实验室,广东广州510640 [2]景德镇陶瓷大学材料科学与工程学院,江西景德镇333001 [3]中国科学院大学,北京100049

出　　处：《矿物学报》2019年第6期673-680,共8页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(批准号：41530313; 41825003; 41402038);广东省科技计划项目(编号：2017B030314175);广东省矿物物理与材料研究开发重点实验室开放基金(编号：GLMPM-045; GLMPM-008);广东省特支计划青年拔尖人才基金项目(编号：2015TQ01Z797)

摘　　要：河北灵寿蛭石是矿物学意义上的蛭石,其晶体化学特征对蛭石的开发应用具有重要的意义。本文利用X射线衍射(XRD)、化学分析(XRF)、红外光谱(FTIR)、热分析(TG-DTG)等技术对提纯后的河北灵寿蛭石矿物的成分和晶体结构等矿物学特征进行了研究。在此基础上,通过控制不同相对湿度条件,考察了晶体化学特性对蛭石层间水化行为的影响。结果表明,河北灵寿蛭石属于矿物学意义上的三八面体蛭石,层间水化阳离子为Ca2+,平均层电荷数为0.61 eq/O10(OH)2(半晶胞)。晶层之间电荷分布不均匀,表现为部分层间域中含有一定量的K+。该蛭石具弱膨胀性,其d002随环境湿度不同而变化。The crystal chemical characteristics of the Lingshou vermiculite,a mineral defined by using XRD,in Hebei Province are significantly important for its development and application.In this work,the XRD,XRF,FTIR,and TG-DTG techniques are applied to study mineralogical characteristics including mineral composition and crystal structure of the purified vermiculite samples in Lingshou County,Hebei Province.On the basis of above works,the effects of crystal properties on the hydration behavior of vermiculite have been investigated by controlling conditions of different relative humidities.The results show that the Lingshou vermiculite is a trioctahedral one with the interlaminar hydration cation of Ca2+and average layer charge of 0.61 eq/O10(OH)2(half unit cell).The inhomogeneous charge distribution between different crystal layers is represented by a certain amount of K+contained in partial interlamination.The d002 values of vermiculite samples,which have weak expandability,vary with the variation of ambient humidities.

关 键 词：灵寿 蛭石 晶体化学 层间水化 

分 类 号：P575[天文地球—矿物学] P579[天文地球—地质学]