一颗含八面体金刚石及对称云雾状包裹体的褐色刻面钻石  

One Faceted Brown Diamond With Octahedral Diamond and Symmetrical Clouds Inclusion

作　　者：刘欣蔚 吴德海 吴改 王春杰 LIU Xin-wei;WU De-hai;WU Gai;WANG Chun-jie(Gemmological Institute,China University of Geosciences(Wuhan),Wuhan 430074,China;School of Resources,Environment and Jewelry,Jiangxi College of Applied Technology,Ganzhou 341000,China;Key Laboratory of Ionic Rare Earth Resources and Environment,Ministry of Natural Resources,Ganzhou 341000,China;Institute of Technological Sciences,Wuhan University,Wuhan 430072,China;Baogu Technology(Shenzhen)Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]中国地质大学(武汉)珠宝学院,湖北武汉430074 [2]江西应用技术职业学院资源环境与珠宝学院,江西赣州341000 [3]自然资源部离子型稀土资源与环境重点实验室,江西赣州341000 [4]武汉大学工业科学研究院,湖北武汉430072 [5]宝谷科技(深圳)有限公司,广东深圳518000

出　　处：《光谱学与光谱分析》2024年第11期3244-3250,共7页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(62004141);江西应用技术职业学院成因矿物学研究与应用科技创新平台(2302320005)资助。

摘　　要：金刚石包裹体保留了金刚石形成时的大量信息,不同包裹体类型对应不同的生长环境。金刚石中包裹金刚石包裹体的研究较少,学者对其成因产生了热烈探讨,但是对于金刚石中包裹体的研究通常需要进行破坏性制样,该类研究方法不适用于成品钻石研究测试。利用拉曼光谱成像技术,获得高分辨率的拉曼光谱面扫描图像,结合红外光谱、光致发光光谱以及三维荧光光谱对一颗含有金刚石包裹体和云雾状包裹体的刻面成品钻石进行无损研究。样品体色呈褐色并伴有绿色调,透过台面可见其亭部围绕亭尖的深褐色环带状以及深褐色对称放射状云雾,肉眼可见中间一晶体,显微特征显示其为八面体晶形,长波紫外灯下有明显绿色荧光。根据红外光谱可知该钻石为Ⅰa型,深褐色对称放射状云雾与钻石富氢相关,其褐色体色与非变形相关缺陷和变形相关缺陷有关。低温液氮光致发光光谱测试可知钻石存在H4中心,推断该钻石可能经过放射性辐照和高温退火过程,PL谱峰中545和563 nm处与氢缺陷有关,637 nm处与NV-缺陷中心有关,741 nm处GR1缺陷是导致钻石带绿色调的原因,钻石经过天然辐照,在驻留过程中未曾经历过高温环境。三维荧光光谱验证了钻石在长波紫外荧光下发出的强绿色荧光与λ_(em) 520 nm处为宽荧光峰有关,最佳激发波长位于λex 420 nm处,该荧光中心与H3有关,进一步验证了该钻石经历了辐照和退火过程。通过拉曼光谱确认样品中八面体晶体为金刚石包裹体,根据拉曼面扫描结果,包裹体边缘的谱峰频移相差较大,金刚石包裹体存在一定的应力,通过推算残余应力最大约为0.49 GPa,包裹体结晶过程中间结晶速度较边部更快,包裹体和寄主接触位置存在残余应力可能与其在结晶过程中温压条件发生变化有关。另外,钻石中含有的杂质较多,也可使其产生一定的晶格畸变。Diamond inclusions retain a lot of information when the diamond is formed.Different types of inclusions correspond to different growth environments.There are few studies about diamond inclusion in diamonds,and researchers have heatedly discussed its forming mechanism.However,the study on diamond inclusions usually requires destructive sample preparation,and this research method is unsuitable for faceted diamond research.This paper used Micro-Raman spectroscopy mapping technology to receive high-resolution Raman mapping images.They use infrared,photoluminescence,and three-dimensional fluorescence spectroscopy to study non-destructively on a faceted diamond sample with diamond inclusion and symmetrical cloud inclusions this brown sample with a green hue.The table shows the dark brown ribbon around the pavilion and the inclusion of symmetrical radiate clouds.A crystal can be seen in the middle with the naked eye,and microscopic characteristics show its octahedral habit.Obvious green fluorescence can be seen under longwave ultraviolet.According to the infrared spectrum,these diamond types and dark brown radiate clouds are related to hydrogen-rich.Its brown body color is related to non-deformation-related defects and deformation-related defects.The low-temperature photoluminescence spectrum shows that this sample has an H4 center,and it is inferred that the diamond may undergo radiated irradiation and high-temperature annealing.Peaks at 545 and 563 nm of PL are related to hydrogen defects,peak at 637 nm(ZPL of NV-center),and peak at 741 nm GR1 defects,which caused the green hue of diamond.This implies that this diamond has been naturally irradiated and has not experienced high temperatures during residence.Three-dimensional fluorescence spectroscopy verifies that the sample emitted strong green fluorescence under LWUV,related to the broadened peak atλ_(em)520 nm.The optimal excitation wavelength is located atλ_(ex)420 nm.The fluorescence center is related to H3,verifying that the diamond has undergone irradiation an

关 键 词：金刚石包裹体 对称云雾状包裹体 拉曼光谱面扫描 绿褐色钻石 

分 类 号：P575.4[天文地球—矿物学]