光谱学与光谱分析, 2012, 32 (3): 651, 网络出版: 2012-04-16
Be扩散处理、 热处理和天然双色昌乐蓝宝石的宝石学特征与鉴别
Gemology Characterization and Identification of Beryllium Diffused, Heated and Untreated Bicolor Sapphires from Changle City, China
双色蓝宝石 紫外可见光谱 红外光谱 二碘甲烷浸液 Bicolor sapphire UV-Vis spectroscopy IR spectroscopy Methylene iodide immersion
摘要
对中国山东昌乐Be扩散处理、 热处理和未处理双色蓝宝石(黄色和蓝色)进行了宝石学常规测试、 紫外可见光谱、 红外光谱、 电子探针和激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)测试, 以获得它们的谱学特征, 提出其鉴别方法。 研究发现Be扩散处理双色蓝宝石仅出现Fe3+—Fe3+形成的紫外可见吸收峰, 而且377 nm吸收峰的强度异常高。 红外光谱中, 热处理和未处理的双色蓝宝石存在明显的3 310 cm-1羟基吸收峰, 而该吸收峰在Be扩散处理双色蓝宝石中消失。 因此, 紫外可见光谱和红外光谱可用于鉴别Be扩散处理、 热处理和未处理双色蓝宝石。 另外, 二碘甲烷浸油实验也可识别Be扩散处理双色蓝宝石。
Abstract
Be-diffused, heated and untreated bicolor sapphires (blue and yellow) from Changle City, Shandong Province, China were studied by using standard gemological methods, ultraviolet-visible (UV-Vis) spectroscopy, infrared (IR) spectroscopy, electron microprobe, and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to obtain the spectra characterization, and to suggest identification methods for them. Only Fe3+—Fe3+ absorption bands formed in ultraviolet region appear in Be-diffused bicolor sapphire, which is especially strong at 377 nm. In IR absorption spectra, absorption peak at 3 310 cm-1 appears in heated and untreated bicolor sapphires, while it disappears in Be-diffused bicolor sapphire. Therefore, UV-Vis and IR absorption spectra can be used to identify Be-diffused, heated and untreated bicolor sapphires. On the other hand, methylene iodide immersion observation also can be used to identify Be-diffused bicolor sapphire.
陈涛, 杨明星. Be扩散处理、 热处理和天然双色昌乐蓝宝石的宝石学特征与鉴别[J]. 光谱学与光谱分析, 2012, 32(3): 651. CHEN Tao, YANG Ming-xing. Gemology Characterization and Identification of Beryllium Diffused, Heated and Untreated Bicolor Sapphires from Changle City, China[J]. Spectroscopy and Spectral Analysis, 2012, 32(3): 651.