Electron Probe Quantitative Analysis of HREE-V-Aluminosilicate Minerals

ZHANG Wenlan; HU Huan; LIU Peng; CHEN Xiaodan

doi:10.15898/j.cnki.11-2131/td.202110250155

2022 Vol. 41, No. 5

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ZHANG Wenlan, HU Huan, LIU Peng, CHEN Xiaodan. Electron Probe Quantitative Analysis of HREE-V-Aluminosilicate Minerals[J]. Rock and Mineral Analysis, 2022, 41(5): 754-763. doi: 10.15898/j.cnki.11-2131/td.202110250155

Citation:

ZHANG Wenlan, HU Huan, LIU Peng, CHEN Xiaodan. Electron Probe Quantitative Analysis of HREE-V-Aluminosilicate Minerals[J]. Rock and Mineral Analysis, 2022, 41(5): 754-763. doi: 10.15898/j.cnki.11-2131/td.202110250155

Electron Probe Quantitative Analysis of HREE-V-Aluminosilicate Minerals

1.
State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
2.
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China
3.
Key Laboratory of Metallogeny and Mineral Assessment, Ministry of Natural Resources; Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

Received Date: 08 October 2021

Revised Date: 05 July 2022

Accepted Date: 20 August 2022

Publish Date: 28 September 2022

Abstract

Abstract

BACKGROUND
Jingwenite, Y₂Al₂V₂⁴⁺(SiO₄)₂O₄(OH)₄), from Yushui Copper Mine, Meizhou City, Guangdong Province, is a type of HREE-V hydrated aluminosilicate minerals. Since its discovery, no research has been done. During electron probe microanalysis (EPMA) for HREE minerals, many characteristic X-ray lines are excited when samples are bombarded by a high-voltage electron beam. The lines are not only numerous, but also seriously overlap with each other. It is very difficult to obtain optimal data, and it is a technical problem that needs to be solved.
OBJECTIVES
To obtain ideal chemical composition data by fine quantitative analysis of the mineral by EPMA to provide theoretical data technical support for the naming of the new mineral.
METHODS
Full element wave spectrum scanning for Jingwenite by JEOL JXA-8530F Plus.
RESULTS
(1) 17 elements were identified by wave dispersive scanning with an accelerating voltage of 15kV and a beam current of 100nA; (2) Stripping overlapped peak during the quantitative analysis; (3) Peak positions, upper and lower background values of 17 elements were set by Zoom-Peak ID program in quantitative analysis; (4) The ideal quantitative analysis results (total 97.41wt%) were obtained by selecting appropriate standard samples and testing dwell time.
CONCLUSIONS
The above four items are key factors to ensure ideal quantitative analysis data.
- HREE mineral /
- electron probe microanalyzer /
- analysis conditions /
- lines interference /
- overlapped peak stripping

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References

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