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+).
出处
《矿物学报》
CAS
CSCD
北大核心
1993年第4期293-302,共10页
Acta Mineralogica Sinica
关键词
蒙皂石
矿物化学
晶体化学
含铝
Al-containing dioctahedral smectite
statisticaly characteristic
crystal chemical type
cation exchange capacity
