【引用本文】 方飚, 严雪俊, 孙青, 等. 应用扫描电镜-红外与反射光谱研究海水灰色Akoya珍珠特异的矿化微结构特征[J]. 岩矿测试, 2021, 40(1): 42-49. doi: 10.15898/j.cnki.11-2131/td.201908200124
FANG Biao , YAN Xue-jun , SUN Qing , et al. Study on the Unique Mineral Microstructure of Seawater Cultured Gray Akoya Pearl by SEM, FTIR and Reflection Spectroscopy[J]. Rock and Mineral Analysis, 2021, 40(1): 42-49. doi: 10.15898/j.cnki.11-2131/td.201908200124

应用扫描电镜-红外与反射光谱研究海水灰色Akoya珍珠特异的矿化微结构特征

1. 浙江方圆检测集团股份有限公司, 浙江 杭州 310013;

2. 浙江工业大学材料科学与工程学院, 浙江 杭州 310014;

3. 浙江工业大学温州科学技术研究院, 浙江 温州 325024

收稿日期: 2019-08-20  修回日期: 2020-01-31 

基金项目: 浙江省质监系统科研项目(20190320);温州市基础性农业科技项目(N20190008);温州市重大科技专项(ZG2017029)

作者简介: 方飚,本科,工程师,主要从事宝玉石检测科研工作。E-mail:408273021@qq.com。。

Study on the Unique Mineral Microstructure of Seawater Cultured Gray Akoya Pearl by SEM, FTIR and Reflection Spectroscopy

1. Zhejiang Fangyuan Testing Group Co., LTD, Hangzhou 310013, China;

2. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China;

3. Wenzhou Institute of Science and Technology, Zhejiang University of Technology, Wenzhou 325024, China

Received Date: 2019-08-20
Revised Date: 2020-01-31

摘要:近年来海水灰色Akoya珍珠是珍珠类饰品的新宠,前期就其研究主要聚焦在对其海水属性、各结构单元的元素赋存特征、辐照处理及其鉴别方法等。本文借助紫外可见(UV-Vis)反射光谱仪、显微红外光谱仪、扫描电镜等研究具有白色内核的一类灰色珍珠的宝石学与其精细结构特征。结果表明:①在珍珠的珠核与珍珠层之间,基本存在厚约几十微米的褐色有机质过渡层。在珠核至珍珠表面的径向上,靠近褐色过渡层的珍珠层区域中存在无特定形态区域,该区域物相组成所对应的红外光谱中可见分别归属球文石(约1444cm-1、887cm-1)与方解石(约1410cm-1、872cm-1、708 cm-1)的特征吸收。同时,在接近珍珠表面处的珍珠层中文石板片形貌较不规则,而在珍珠径向上并位于珍珠层的中间区域中文石则呈规则的板片形貌,且自内核至珍珠表层方向上,文石板片的厚度呈现渐薄特征。②整个珍珠表面的反射光谱与外层单一的珍珠层的光谱特征一致,上述褐色过渡层对整个珍珠的UV-Vis反射光谱无直接影响,因此该褐色过渡层是否对珍珠呈现灰色产生影响有待进一步商榷。研究工作对灰色Akoya珍珠的呈色机理探究及形成属性的鉴别具有较重要的指导意义,同时可进一步丰富人们对具有0.3~0.6mm薄层珍珠层的珍珠品类其精细结构及矿化特征的认知。

关键词: 灰色珍珠, 微结构, 过渡层, 珍珠层, 紫外可见反射光谱, 扫描电镜

Study on the Unique Mineral Microstructure of Seawater Cultured Gray Akoya Pearl by SEM, FTIR and Reflection Spectroscopy

KEY WORDS: gray pearl, microstructure, transition layer, nacre, UV-Vis reflectance spectroscopy, scanning electron microscope

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应用扫描电镜-红外与反射光谱研究海水灰色Akoya珍珠特异的矿化微结构特征

方飚, 严雪俊, 孙青, 吴静怡, 李淑华, 严俊