basic plagioclase
基性斜长石由于遭受钠黝帘石化，其蚀变产物常带绿色色调；
The mafic due to sodium zoisitization, its alteration products often with green color;
youdao
一般情况下，酸性斜长石双晶纹密集且平直，而基性斜长石的双晶纹较稀且不够平直。
In general, acid plagioclase twin dense and flat, while the mafic twin is thin and not straight.
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