Xia Dong-Qing, Qin Ying, Jin Pu-Jun, Mao Zheng-Wei, Dong Ya-Wei
The Laboratory of Archaeometry, University of Science and Technology of China, Hefei 230026, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2009 Oct;29(10):2867-70.
XRD and XRF were used to identify several brass coins of Qing dynasty collected in the Ezhou Museum and excavated from Ezhou of Hubei province. The reality of the coins contains 36.53%-37.75% of Zn, 54.12%-59.04% of Cu and 3.51%-7.56% of Pb, and the ration of the alloy is steady and scientific, indicating that the technic of the alloy of brass was quite perfect in the mid to late of Qing dynasty. Zn3Cu2 (OH)6 (CO3)2 was found in the corrosion for the first time, and CuO, ZnO, Fe2O3 and CuCl were found too. The high content of Cl-, around the local condition (including the polluted environment), may be the main reason for those brass coins to be eroded seriously. These findings provide some reference for collecting and protecting coins.
利用X射线衍射仪（XRD）和X射线荧光光谱仪（XRF）对鄂州市博物馆馆藏及湖北鄂州出土的几枚清代铜币进行了鉴定。铜币成分中锌含量为36.53%-37.75%，铜含量为54.12%-59.04%，铅含量为3.51%-7.56%，合金比例稳定且科学，表明清代中后期黄铜合金工艺相当完善。首次在腐蚀产物中发现了碱式碳酸铜锌矿[Zn3Cu2(OH)6(CO3)2]，同时还发现了氧化铜、氧化锌、氧化铁和氯化亚铜。局部环境（包括污染环境）中较高的氯离子含量可能是这些铜币被严重腐蚀的主要原因。这些研究结果为铜币的收藏和保护提供了一定参考。
