圣水峪辉绿泥石中多型的体衍生  

A SYNTACTIC INTERGROWTH BETWEEN POLYTYPES OF DIABANTITE FROM SHENGSHUIYU

作　　者：罗谷风[1] 王玉华[2] 薛纪越[1] 张富生[3] 

机构地区：[1]南京大学地球科学系,江苏南京210093 [2]南京大学图书馆,江苏南京210093 [3]南京大学现代分析中心,江苏南京210093

出　　处：《矿物学报》2001年第3期295-298,共4页Acta Mineralogica Sinica

基　　金：高等学校博士学科点专项科研基金

摘　　要：根据透射电镜观察 ,在采自山东省泗水县圣水峪并作为镁普通角闪石之蚀变产物的辉绿泥石(K0 .0 1Na0 .0 1Ca0 .0 2 Mn0 .0 1Fe1.82 Mg2 .6 1Cr0 .0 4Al1.30 ) [Al0 .88Si3.12 O10 ](OH) 8中 ,发现了由两种不同的绿泥石规则一层多型所构成的体衍生现象。确认其中一种为α =12 0°的Ⅰb 3或Ⅱab 4多型 ,另一种为未确定的某种多型 (α =90°)。两者间的三维相互取向关系为 ,彼此的c 轴完全一致 ,a轴和b轴也都对应地两两相互平行 ;同时还有它们的 ( 0 0 1)面网间距d(0 0 1) 彼此相等。A syntactic intergrowth between two regular one-layer polytypes of diabantite (K 0.01 Na 0.01 Ca 0.02 Mn 0.01 Fe 1.82 Mg 2.61 Cr 0.04 Al 1.30 ) 5.83 [(Al 0.88 Si 3.12 ) 4.00 O 10 ](OH) 8, as an altered product of magnesio-hornblende, was found in diorite from Shengshuiyu, Sishui, Shandong Province by means of TEM observation. It was revealed that one of the two polytypes is type Ⅰb-3 or Ⅱab-4 with α=102°, and the other is an undetermined one with α=90°. The mutual-orientation relationship in 3-dimensions of them is that their a-axes, b-axes and c *-axes are parallel to each other, respectively. In addition, their (001) spacing is identical.

关 键 词：辉绿泥石 体衍生 透射电子显微术 硅酸盐矿物 晶体结构 面网间距 

分 类 号：P578.962[天文地球—矿物学]