钙质金珊瑚的结构特征及其晕彩成因

Structure of the Golden Calcareous Coral and Origin of Its Iridescence

钙质金珊瑚近10余年才被发现,因产量稀少,不为人熟知。其表面具特殊的晕彩效应而不同于常见的钙质型红珊瑚和角质型金珊瑚、黑珊瑚。为进一步了解此种钙质金珊瑚的结构特征,本文采用光学显微镜、扫描电子显微镜,配合X射线显微能谱和LA-ICP-MS测试进行观察研究,发现其内部文石层与有机物层相互交叠,而单个文石颗粒由更加微细的纳米级结构堆叠而成,正是这种有机-无机的纳米级组合结构导致了钙质金珊瑚表面的特殊晕彩。

Golden calcareous coral was discovered in latest decade. It was unknown by people due to the low output. Its iridescence on the surface makes it very different from the common red calcareous coral, golden horny coral and black coral. Optical microscope, scanning electron microscope with micro X-ray spectrometer and LA-ICP-MS are applied in the research on the structure of the golden calcareous coral. Research reveals that it consists of the interlayers of aragonite layers and organic layers, and the single aragonite layer consists of micronanometer grains. Such combination of organic and inorganic nanometer material results in the special iridescence effect on the surface of golden calcareous coral.