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Spectroscopic characteristics of the allanite
Chen Fei1,2; Su Wen1; Zhang Ming3; LI XiaoGuang1; HU XinMeng1,2
AbstractSix allanite-bearing samples from different occurrences and locations including four pegmatites and two skarns are studied. The pegmatites are from the Yiyuanxing (M1663) and the Chahanying (M7673) in the Tsining of Inner Mongolia, the Amherst County Virginia of America (M4960), the Liksviken of Norway (M4976). The skarns are from Hebei Province (M1697) and the Chen County of Hunan Province (M1679). The chemical features of six allanite samples are revealed by analysis of the major and trace elements of Electron Probe Microanalysis (EPMA), Raman, Infrared spectroscopy. The results show that compositions of allanite grains are homogeneous. The allanite grains have cracks with vein filled. However, the contents of major element including FeO, CaO and Al2O3 and Rare Earth Element (REE) such as Ce2O3, Nd2O3 and La2O3 are different in the allanites. The systematic spectroscopic data of the allanites show that the characteristic peak intensity and their shift are related to their components, and assigning, discussing the relationship between special peak shift of allanite, the component of element and its crystal structure. The systematic research of Raman, Infrared spectroscopy and its constituent not only can reveal characteristics of the crystal structure, but also can discuss the difference between its structure and forming environment. Raman spectroscopy reveals that there are 20 Raman peaks of the allanites (v1 similar to v20). The peaks shift of v2 similar to v4, v5 similar to v8 and v16 similar to v19 are related to the substitution between Ca and REE. The v10 similar to v12 are attributed to the O-Si-O bending vibration modes and their peak shift are related to Si content. The shifts of v13 - v14 maybe result of the combined action of multi-element changes. Infrared spectroscopy shows 13 infrared peaks (a-m) of the allanites. The peak shifts of h-k are described as substitution between Fe3+ and Al on the M1 or M3. The shifts of b-g are attributed to Si-O asymmetric stretching modes on the Si-O tetrahedron. The occurrence of OH double peaks of stretching (1-m) may be related to the content of Fe3+ at the M1 and M3. Our results show that substitution between Fe3+ and Al3+ of the allanite of the pegmatites is more than the allanite of the skarns. However, substitution between REE and Ca on the A of the allanite of the pegmatites is less than those of the skarns.
KeywordAllanite Crystal structure Raman spectrum Infrared Spectrum
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000456937400018
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Document Type期刊论文
Corresponding AuthorSu Wen
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Acad Engn Phys, Inst Mat, Jiangyou 621908, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Chen Fei,Su Wen,Zhang Ming,et al. Spectroscopic characteristics of the allanite[J]. ACTA PETROLOGICA SINICA,2019,35(1):233-242.
APA Chen Fei,Su Wen,Zhang Ming,LI XiaoGuang,&HU XinMeng.(2019).Spectroscopic characteristics of the allanite.ACTA PETROLOGICA SINICA,35(1),233-242.
MLA Chen Fei,et al."Spectroscopic characteristics of the allanite".ACTA PETROLOGICA SINICA 35.1(2019):233-242.
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