摘要
本文提出了斜交c轴但平行b轴或垂直(100)面的第三种类型的特殊切面,并通过数学运算建立其上的解理夹角与结晶学方位之间的关系,致使据已知的辉闪石的光性方位,可计算得知该类切面的光学性质。
People often pay more attention to the sections of ⊥ axis c and // axis c when doing researches on pyribolc minerals by using a polarizing microscope.A special section that is ∧ axis c but // axis b or ⊥ (100) plane has been put forward, which is named Type III section by the author.The relation between the cleavage plane angle on this section and the crystallographic orientation of this section has been set up,thus the optical properties of this section can be calculated according to the optical orientation of pyribolc.As this kind of section exists more frequently than the section that is ⊥ axis c or // axis c in a thin pyribolc-bearing rock section, the application of type III section is more practical.
出处
《矿物岩石》
CAS
CSCD
1990年第2期19-22,共4页
Mineralogy and Petrology
关键词
辉闪石
切面
解理角
结晶学
方位
pyribole
new type of section
clcavage plane angle
crystallographic orientation
