Study on the Surface Morphology and Its Vibrational Spectra of Diamond From the Western Yangtze Craton
YANG Zhi-jun1,2, MAO Meng-ai1, HUANG Yi-cong1, ZHANG Jia-wei1
1. School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275, China
2. Key Laboratory of Geological Processes and Mineral Resources Exploration, Guangdong Province, Guangzhou 510275, China
Abstract：Based on the possibility to provide scientific clues for the inversion of diamond formation environment and the design of the diamond synthesis process, the paper studied the relationship between the surface morphology, the content of impurity nitrogen and hydrogen and the degree of order in structure of natural placer diamonds from the western Yangtze Craton by using the optical microscope, infrared spectroscopy and Raman spectroscopy. The results show that the surface morphology on diamond includes micro-morphology related to crystal growth, ablation morphology depend on crystal orientation, ablation morphology independ on crystal orientation, and morphology related to stress deformation. The diamonds mainly belong to type IaAB and the nitrogen content in them is 22.90～752.40 μg·g-1. The concentration of sp3 hybridized C—H bond is higher than of sp2 hybridized C—H bond in most of the samples, that indicated the existence of hydrogen was conducive to transformation from the A nitrogen center to B nitrogen center in diamond and the sp3 hybridized C—H bond may result in the formation of corrosion pits and affect slightly the others morphology of the diamond surface. All of the surface morphologies would lower the degree of order of diamond. The degree of surface order was the highest in diamond with halo and the lowest in diamond with growth lamella.
杨志军，毛梦嫒，黄逸聪，张佳伟. 扬子克拉通西部金刚石的表面形貌特征及其振动光谱研究[J]. 光谱学与光谱分析, 2022, 42(01): 236-242.
YANG Zhi-jun, MAO Meng-ai, HUANG Yi-cong, ZHANG Jia-wei. Study on the Surface Morphology and Its Vibrational Spectra of Diamond From the Western Yangtze Craton. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(01): 236-242.
[1] Simakov S K. Ore Geology Reviews, 2018, 102: 195.
[2] Attrash M, Kuntumalla M K, Michaelson S, et al. Surface Science, 2021, 703: 121741.
[3] Howell D, Collins A T, Loudin L C, et al. Diamond & Related Materials, 2019, 96: 207.
[4] Yang Z J, Li H Z, Peng M S, et al. Chinese Science Bulletin, 2008, 53(1): 137.
[5] Taylor W R, Canil D, Milledge H J. Geochimica Et Cosmochimica Acta, 1996, 60(23): 4725.
[6] Yang Zhijun, Liang Rong, Zeng Xiangqing, et al. ISRN Spectroscopy, 2012, 2012: 1.
[7] HU Piao-ye, ZENG Liang-liang, YANG Zhi-jun, et al(胡飘野，曾亮亮，杨志军, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2015, 35(6): 1534.
