摘要
研究表明,含铁矿物中铁的平均价态(反映Fe^(2+)和Fe^(3+)含量)与Fe Lβ/Fe Lα值呈正比关系曲线。未知样品只要测得TFeO含量和Fe Lβ、Fe Lα的计数值,就可以分别获得FeO和Fe_2O_3的定量分析结果。经几种含铁矿物测定实例验证,说明方法可行。
It was shown that the average valence of Fe in minerals is related to the ratio Fe Lβ/Fe Lα. The T FeO and the counting rates of Fe Lβ and Fe Lα of an unknown sample were measured by electron probe. The average valence of Fe was obtained from a correlation curve of Fe L#βFe Lα versus and average valence of Fe which was constructed by using a series of iron-bearing mineralstandards. The contents of Fe(II)and Fe(III)could be calculated from the following equations:
XFeo=[(3--N) ×nFc×nFe2O3]/[(N-2) ×nFeO×2nFe+ (3-N) ×nFe×nFe2O3] × c% XFe2O3=[(N-2)×nFe×nFe2o3]/[(N-2)×nFeO×2nFe+ (3-N) × nFe×nFe2O3]×c% where XFeo and XFe2o3 are the percentage contents of FeO and Fe2O3 in the sample, 2V the average valence of Fe in the sample, n the molecuter (or atomic) weight, and c the TFeO in the sample, respectively.
出处
《岩矿测试》
CAS
CSCD
北大核心
1992年第4期306-310,共5页
Rock and Mineral Analysis
基金
中国地质科学院科研基金项目
关键词
矿物
含铁
电子探针
定量分析
iron(II), iron(III), electron probe, average valence, iron-bearing mineral
