结果表明，珍珠表面的瓷质层由两种形貌完全不同的六方碳钙石组成。
It can be concluded that the porcelaneous layers are composed of vaterites with two kinds of microscopic morphology.
用透射电镜(TEM)观察螺旋形碳晶须的微观形貌，并作选区电子衍射，分析其结构，可知螺旋形碳晶须的结构为六方晶体。
Using the TEM to observe the micro shape of coiled carbon whiskers, and analyze their structure by electron diffraction, it can be informed that its structure is hexagonal crystal.
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