文献类型：期刊文献

英文题名：Ce(III) salt induced changes of superficial microstructure in freshwater pearls

作者：Shi Weilin; Jin Yefei; Ma Xiying

机构：[1]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China

年份：2007

卷号：25

期号：5

起止页码：637

外文期刊名：JOURNAL OF RARE EARTHS

收录：SCI-EXPANDED(收录号：WOS:000250691900023)、、WOS

语种：英文

外文关键词：pearls; microstructure; aragonite blocks; glossiness; rare earth elements

外文摘要：The transition of the superficial microstructure of freshwater pearls induced by Ce was investigated by means of scanning electron microscopy. The pearls were cultured in freshwater containing 0 (control group), 0.5, 1, and 1 1.5 mg center dot L-1 of a Cc additive. X-ray photoelectron spectroscopy (XPS) measurement showed that the concentration of Ce absorbed in the superficial microstructure of pearls was positively correlated to the additive Ce. At the same time, the surface microstructure of pearls changed greatly with Cc concentration, the shape of the blocks changed from spindly to perfect regular hexagonal sheets and finally to round discs. The glossiness of the pearls changed correspondingly with the microstructure, pearls possessing the regular hexagonal blocks having the highest glossiness. Therefore, the REE Ce exerted a significant influence on the microstructure and glossiness of freshwater pearls. An appropriate quantity of Ce may improve the glossiness of pearls.