作者：严俊^1,2, 邵惠萍², 黄雪冰², 严雪俊², 余思逸², 胡仙超³

作者单位：1. 浙江省质量检测科学研究院, 浙江 杭州 310013;
2. 浙江方圆检测集团股份有限公司, 浙江 杭州 310018;
3. 浙江工业大学分析测试中心, 浙江 杭州 310014

关键词：天然钻石;N₃中心;傅里叶变换红外光谱;紫外-可见吸收光谱

摘要：

通过傅里叶变换红外（Fourier transform infrared，FTIR）光谱结合紫外-可见吸收光谱（UV-Vis absorption spectra）及钻石观测仪（DiamondView）对有无415 nm吸收的无色与近无色天然钻石进行较系统的荧光与光谱特征研究。结果表明：UV-Vis吸收光谱中具有明显415 nm特征吸收的样品所对应的FTIR吸收光谱中1 376～1 359 cm-1处都存在较强且尖锐的吸收峰。相反，UV-Vis吸收谱图中无明显415 nm吸收的样品相应的红外谱图的1 376～1 359 cm-1处无明显的吸收峰位。且部分无415 nm吸收峰的样品在DiamondView下其荧光的颜色可呈现为黄绿色、黄绿色中夹杂蓝色或呈单一的蓝色，因此钻石在DiamondView下荧光呈蓝色是否直接归因于其中的N3尚待进一步商榷。该结论可为合成钻石与天然钻石的鉴定筛选提供一定的技术支持。

Study on the spectral and fluorescent characteristics of natural colorless and near-colorless diamonds with or without N₃

YAN Jun^1,2, SHAO Huiping², HUANG Xuebing², YAN Xuejun², YU Siyi², HU Xianchao³

1. Zhejiang Institute of Quality Inspection Science, Hangzhou 310013, China;
2. Zhejiang Fangyuan Test Group Co., Ltd., Hangzhou 310018, China;
3. Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310014, China

Abstract: A systematic study on the spectral and fluorescent characteristics of natural colorless and near-colorless diamonds with or without 415 nm absorption is carried out by combining with Fourier transform infrared (FTIR) spectra, UV-Vis absorption spectra and DiamondView. The results show that for samples with obvious 415 nm absorption in UV-Vis spectra, they have strong and sharp absorption peak at 1 376-1 359 cm^-1 in corresponding FTIR spectra. On the contrary, for samples without obvious 415 nm absorption in UV-Vis spectra, they do not have obvious absorption peak at 1 376-1 359 cm^-1 in corresponding FTIR spectra. Interestingly, some samples without 415 nm absorption peak have their fluorescence color under DiamondView as yellow green, yellow green mixed with blue or pure blue. Therefore, it needs further discussion to determine whether the blue fluorescence of diamonds under DiamondView is caused by N₃ or not. The research conclusions can provide important technical support for the identification and selection of synthetic diamond and natural diamond.

Keywords: natural diamond;N₃ center;FTIR spectra;UV-Vis absorption spectra

2017, 43(9): 53-58  收稿日期: 2016-12-20;收到修改稿日期: 2017-02-13

基金项目: 国家自然科学基金（21506187）；浙江省质量监督系统科研计划项目（20130207）

作者简介: 严俊(1981-),男,安徽安庆市人,高级工程师,博士,主要从事宝石及矿物功能材料的研究。

参考文献

[1] WANG W Y, THOMAS M, ROBERT C, et al. Gem-quality synthetic diamonds grown by a chemical vapor deposition(CVD) method[J]. Gems & Gemology,2003,39(4):268-283.
[2] WANG W Y, D'HAENENS-JOHANSSON U F S, JOHNSON P, et al. CVD synthetic diamonds from gemesis corp[J]. Gems & Gemology,2012,48(2):80-97.
[3] JAMES E S, CHRISTOPHER M B, ANDY H S. An updat ed chart on the charact eristics of H PH T grown synthetic diamon ds[J]. Gems & Gemology,2004, 40(4):303-313.
[4] HUANG G F, JIA X P, YIN J W, et al. Preparation of IaA-type diamond crystals containing a high concentration of nitrogen by anneling(111)-oriented N-doped diamond crystals[J]. International Journal of Refractory Metals and Hard Materials,2013,41(11):517-521.
[5] 汤红云,涂彩,陆晓颖,等. 钻石的红外吸收光谱特征及其在钻石鉴定中的意义[J]. 上海计量测试,2013(1):1-6.
[6] 赵倩怡,张攀. 褐黄色IaA+Ib型合成金刚石的光谱测试分析[J]. 超硬材料工程,2012,24(4):50-54.
[7] WANG W Y, ALTOBELLI M, DIECK C, et al. Screening of small yellow melee for treatment and synthetics[J]. Gems & Gemology,2014,50(4):293-294.
[8] KAREN M M. Aggregate nitrogen in synthetic diamond[J].Applied Physics Letters,2003,83(7):1325-1327.
[9] D'HAENENS-JOHANSSON U F S, KYAW S M, JOHNSON P, et al. Near-colorless HPHT synthetic diamonds from AOTC group[J]. Gems & Gemology,2014, 50(1):30-45.
[10] JAMES E S, CHROSTPHER M B. Visible absorption spectra of colored diamonds[J]. Gems & Gemology,2015,51(1):41-43.
[11] WANG W Y. Very large irradiated yellow[J]. Gems & Gemology,2014,50(4):295.
[12] SALLY E M. CVD synthetic diamond with unusual DiamondView image[J]. Gems & Gemology,2014,50(1):67-68.
[13] ALTOBELLI M, JOHNSON P. Diamond artificially irra- diated and coated brown[J]. Gems & Gemology,2014,50(3):236-237.
[14] 孙媛,陈华,丘志力,等. 中国3个商业性钻石产地天然钻石DiamondView^TM图像及其意义[J].岩石矿物学杂志,2012,31(2):261-270.
[15] 严俊,刘晓波,陶金波,等. 天然钻石与合成钻石的钻石观测仪鉴定特征研究[J]. 光学学报,2015,35(10):1-9.
[16] 颜丙敏,贾晓鹏,秦杰明,等. 氮氢共掺杂金刚石中氢的典型红外特征峰表征[J]. 物理学报,2014,63(4):1-6.