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℃.
出处
《矿物学报》
CAS
CSCD
北大核心
1992年第4期328-333,共6页
Acta Mineralogica Sinica
关键词
偏岭石
煅烧
高岭石
红外光谱法
pianlinite
metakaolinite
infrared absorption spectrum
crystal structure
