摘要
用系列烷基铵（NC=5～18）夹层累托石的底面间距d与烷基链的碳原子数NC关系，测定累托石中蒙皂石层的层电行（ξ）及其分布。用十二烷基铵夹层累托石的d值与ξ的回归方程，测量平均层电荷。用格林-凯氏（Greene－Keily）试验（Li饱和和250℃处理24h的累托石）后的十二烷基铁累托石样，测定四面体电荷，由平均层电荷（ξ）与四面体电荷差值估计八面体电荷。十个样品测定结果，除7号样外，层电行在0．33～0．381eq／（Al，Si）4O10之间，八面体电荷占总层电荷的1／5～1／3。层电荷分布特征有较均匀型和不均匀型两种。
The layer charge (ξ) and charge distribution of smectite layers in rectorite have been determined on the basis of the relationship between basal spacings (d) of a series of alkylammonium intercalated rectorite and a number of carbon atoms in the alkyl - - -chain (NC). The mean layercharge of smectite layers in rectorite has been calculated by a regression equation derived from therelationship between basal spacings (d) of alkylammonium (NC = 12) rectorite vs. mean layercharge (ξ). The tetrehedral charge has been determined on rectorite sample after the GreeneKelly test (Li - - -saturated and heat - treated at 250℃ ). The octahedral charge can be estimated by the difference method.Except sample No. 7, the mean layer charge calculated from ten rectorite samples is 0. 33~0.381 eq / (AlSi)4O10. The proportion of octahedral charge is estimated to account for about 1/5~ 1/3 of the total layer charge. The charge distribution can be divided into two types: homogeneous andheteroge neous.
出处
《矿物学报》
CAS
CSCD
北大核心
1994年第1期1-6,共6页
Acta Mineralogica Sinica
关键词
累托石
烷基铵法
层电荷
蒙皂石层
rectorite
alkylammonium
layer charge
charge distribution
