偏岭石及煅烧高岭石的红外光谱研究  

THE INFRARED SPECTRA OF PIANLINITE AND METAKAOLINITE

作　　者：鲍学昭[1] 关雅先[2] 

机构地区：[1]地质矿产部天津地质矿产研究所,天津300170 [2]长春地质学院,长春130061

出　　处：《矿物学报》1992年第4期328-333,共6页Acta Mineralogica Sinica

摘　　要：通过对偏岭石和相应煅烧高岭石的红外光谱测定,发现偏岭石同煅烧高岭石在结构上有很大的差异。在偏岭石中不存在非晶态SiO_2相,其中Si—O_4四面体同Al—O_6八面体是相互聚合的:煅烧高岭石(600～995℃)中则不同,其中Si大部分是以独立的非晶态SiO_2相存在,而同其中的Al_2O_3相分离。偏岭石同煅烧高岭石的关系是:对偏岭石进行一定温度的煅烧,它可以转变成像煅烧高岭石一样的结构状态。In this paper the infrared absorption spectra of pianlinite and metakaolinite have been studied and the difference in crystal structure between them has been discussed. In the pianlinite no amorphous SiO_2 is found and Si-O_4 tetrahedra link with Al-(O,OH)_6 octrahedra by bridge oxygen. But in the metakaolinite Si is separated with Al, and largely exists in amorphous SiO_2. The metakaolinite consists mainly of amorplous SiO_2 and Al_2O_3. Structurally pianlinite can be turned into metakaolinite by heating it to 730～998℃.

关 键 词：偏岭石 煅烧 高岭石 红外光谱法 

分 类 号：P575.4[天文地球—矿物学]