一粒具强磷光的天然Ⅱa型无色钻石的宝石学及光谱学特征  

Gemmological andspectroscopic characteristic of anatural typeⅡacolorless diamondwith strong phosphorescence

作　　者：徐速 谢应东 王柏宇 XU Su;XIE Yingdong;WANG Boyu(Chengdu Institute of Product Quality Inspection Co.,Ltd.,Chengdu 610100,China;National Gold-Silver Gem&Jewelry Quality Inspection Center(Sichuan),Chengdu 610000,China)

机构地区：[1]成都产品质量检验研究院有限责任公司,四川成都610100 [2]国家金银珠宝饰品质量检验中心(四川),四川成都610000

出　　处：《超硬材料工程》2022年第5期54-58,共5页Superhard Material Engineering

摘　　要：以1粒具强磷光的Ⅱa型无色钻石作为研究对象,对其宝石学特征和谱学特征进行测试分析。结果显示,该样品在正交偏光下出现条带状干涉色,红外光谱结合紫外可见光谱确定为Ⅱa型钻石,Diamond View TM钻石观察仪下观察具橙红色荧光和网状多边形结构,并伴有罕见的强蓝色磷光。光致发光光谱显示NV 0中心、NV-中心、B-interstitial中心和B-V中心。经上述综合分析,该样品为天然Ⅱa型钻石,未经高温高压改色处理,其橙红色荧光由NV 0中心和NV-中心共同贡献,蓝色磷光的产生可能与B-interstitial中心和B-V中心有关。在日常检测过程中,对于此类Ⅱa型钻石的鉴定应全面分析,避免误判。A colorlessⅡa diamond with strong phosphorescent has been studied for the gemmological and specroscopic characteristics.The result indicates that the sample has band interference color observed under crossed-polarized light.The infrared spectrum and UV-Vis spectrum show that the sample is confirmed to be aⅡa diamond.The sample displays orange-red flourescence with polygonal pattern and strong blue phosphorescence which is unusual for a natural diamond by diamond view TM instrument.Photolumiescence spectrum shows NV 0 center,NV-center,B-interstitial center and B-V center.According to the comprehensive analysis,the sample isⅡa diamond of natural origin and not subjected to HPHT annealing.The orange-red flourescence is mainly due to the contribution of NV 0 center and NV-center.The blue phosphorescence is explained by B-interstitial center and B-V center.In the test process,it isconsidered that the identification of this kind ofⅡa diamond should be comprehensively analyzed to avoid misjudgment.

关 键 词：Ⅱa型钻石 磷光 多边形结构 谱学特征 

分 类 号：TS933[轻工技术与工程]