中国二八面体含铝蒙皂石矿物化学和晶体化学的特征  

MINERAL AND CRYSTAL CHEMISTRY OF Al-CONTAINING DIOCTAHEDRAL SMECTITE FROM CHINA

作　　者：潘建强 孔佑华 谢鉴标 

机构地区：[1]浙江省地质矿产研究所,杭州310007

出　　处：《矿物学报》1993年第4期293-302,共10页Acta Mineralogica Sinica

摘　　要：通过对我国64个二八面体含铝蒙皂石矿物化学及晶体化学数据的统计分析,研究了它们的矿物化学及晶体化学的基本特征,并得出八面体组分是影响蒙皂石矿物学及物理化学性质的主要因素。在此基础上,利用AlAl-AlFe—AlMg三角图划分了我国二八面体含铝蒙皂石的晶体化学类型,并对原分类图进行了模式化处理,使AlAl-AlFe—AlMg图更具实际意义。蒙皂石的阳离子交换容量与晶体化学模型有对应性,并受八面体三价离子Fe^(3+)及二价离子Mg^(2+)的控制。Essential mineral and crystal chemistry data of 64 Al-containing dioctahedral smectitesamples from China are statistically analyzed, showing that the octahedral composition is amain factor affecting the mineralogical and physico-chemical properties of smectite. On thisbasis, the crystal chemical types of Al-containing dioctahedral smectite have been classifiedusing the AlAl-AlFe-AlMg triangular diagram, and the original classification diagram hasbeen modelled. This will make the AlAl--AlFe--AlMg triangular diagram be of more practi-cal significance. The cation exchange capacity of Al-containing dioctahedral smectite iscorrelated with its crystal chemical type, and is controlled by the trivalent cation Fe^(3+) andthe bivalent cation Mg^(2+).

关 键 词：蒙皂石 矿物化学 晶体化学 含铝 

分 类 号：P578.94[天文地球—矿物学]