气候变化领域集成服务门户(CCPortal): Electron Probe Microanalysis of Variable Oxidation State Oxides: Protocol and Pitfalls

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DOI	10.1111/ggr.12199
	Electron Probe Microanalysis of Variable Oxidation State Oxides: Protocol and Pitfalls
	Yang, Shui-Yuan; Zhang, Ruo-Xi; Jiang, Shao-Yong; Xie, Jing
通讯作者	Yang, SY (通讯作者)
发表日期	2018
ISSN	1639-4488
EISSN	1751-908X
起始页码	131
结束页码	137
卷号	42 期号:1
英文摘要	Electron probe microanalysis of geological oxide materials relies on stoichiometric considerations to estimate the content of undetermined oxygen and thus calculate ZAF (atomic number, absorption, fluorescence) matrix correction factors, requiring the valences of cations in the corresponding software to be unambiguously defined. However, stoichiometric ZAF corrections may be problematic in the presence of other undetermined elements or variable valence state cations. Herein, we analyse several oxides containing such cations, that is magnetite (Fe3O4), haematite (Fe2O3), hausmannite (Mn3O4) and cuprite (Cu2O). We compare data re-calculated for incorrect valence states (Method 1) with reference values, revealing incorrect results, due to an incorrect amount of oxygen used in the matrix correction. Some solid-solution series of haematite and magnetite were also modelled in CalcZAF program to prove the relative errors when the incorrect oxygen is used. To resolve these issues, we describe two accurate methods. Method 2 uses the true valence states of analysed elements. In Method 3, all cations are analysed as metals, with the content of undetermined oxygen determined by difference. As EPMA software does not allow the use of non-integer valences, Method 3 is applicable to cations with non-integer or dubious valences in cases where these non-integer valences cannot be defined.
关键词	MAGNETITE MINERALS DEPOSIT ELEMENTS ORIGIN ROCK
英文关键词	electron probe microanalysis; oxide; variable oxidation state; magnetite; haematite; hausmannite; cuprite
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000424832400008
来源期刊	GEOSTANDARDS AND GEOANALYTICAL RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259135
推荐引用方式 GB/T 7714	Yang, Shui-Yuan,Zhang, Ruo-Xi,Jiang, Shao-Yong,et al. Electron Probe Microanalysis of Variable Oxidation State Oxides: Protocol and Pitfalls[J]. 中国科学院青藏高原研究所,2018,42(1).
APA	Yang, Shui-Yuan,Zhang, Ruo-Xi,Jiang, Shao-Yong,&Xie, Jing.(2018).Electron Probe Microanalysis of Variable Oxidation State Oxides: Protocol and Pitfalls.GEOSTANDARDS AND GEOANALYTICAL RESEARCH,42(1).
MLA	Yang, Shui-Yuan,et al."Electron Probe Microanalysis of Variable Oxidation State Oxides: Protocol and Pitfalls".GEOSTANDARDS AND GEOANALYTICAL RESEARCH 42.1(2018).