{"title":"EPMA对Fe2+/Fe3+和Mn2+/Mn3+比的估计","authors":"佳央 木村, 正秀 赤坂","doi":"10.2465/GKK1952.28.159","DOIUrl":null,"url":null,"abstract":"We have reinvestigated the relationship between the relative intensities of Lα and Lβ X-ray emission peaks, [Lβ/Lα], and Fe2+/Fe3+ or Mn2+/Mn3+-ratios in silicate minerals. For Fe-bearing silicates, two kinds of regression lines were obtained; (1) 0≤[Fe2++/(Fe2++Fe3+)]≤0.74: [Lβ/Lα]Fe=0.1414×[Fe2+/(Fe2++Fe3+)]+0.4121 (R2=0.986), (2) 0.74≤[Fe2+/(Fe2++Fe3+)]≤1.00: [Lβ/Lα]Fe=0.8024×[Fe2+/(Fe2++Fe3+)]-0.0798 (R2=0.973). By using these regression lines, it is possible to estimate semiquantitative Fe2+/(Fe2++Fe3+)-ratio of Fe-silicates containing total FeO more than 5 wt.%. For Mn-bearing silicates, a regression line of [Lβ/Lα]Mn=0.46×[Mn2+/(Mn2++Mn3+)]+0.554 (R2=0.968) was obtained. However, even if samples contain total MnO more than 10 wt.%, standard deviation of [Lβ/Lα]Mn-ratio for each sample is large. Thus, [Lβ/Lα]Mn-ratio can not be used for semiquantitative determination of Mn2+/(Mn2++Mn3+)-ratio but gives us qualitative information.","PeriodicalId":242743,"journal":{"name":"Journal of the Mineralogical Society of Japan","volume":"81 4 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":"{\"title\":\"EPMAによるFe2+/Fe3+およびMn2+/Mn3+比の見積もり\",\"authors\":\"佳央 木村, 正秀 赤坂\",\"doi\":\"10.2465/GKK1952.28.159\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We have reinvestigated the relationship between the relative intensities of Lα and Lβ X-ray emission peaks, [Lβ/Lα], and Fe2+/Fe3+ or Mn2+/Mn3+-ratios in silicate minerals. For Fe-bearing silicates, two kinds of regression lines were obtained; (1) 0≤[Fe2++/(Fe2++Fe3+)]≤0.74: [Lβ/Lα]Fe=0.1414×[Fe2+/(Fe2++Fe3+)]+0.4121 (R2=0.986), (2) 0.74≤[Fe2+/(Fe2++Fe3+)]≤1.00: [Lβ/Lα]Fe=0.8024×[Fe2+/(Fe2++Fe3+)]-0.0798 (R2=0.973). By using these regression lines, it is possible to estimate semiquantitative Fe2+/(Fe2++Fe3+)-ratio of Fe-silicates containing total FeO more than 5 wt.%. For Mn-bearing silicates, a regression line of [Lβ/Lα]Mn=0.46×[Mn2+/(Mn2++Mn3+)]+0.554 (R2=0.968) was obtained. However, even if samples contain total MnO more than 10 wt.%, standard deviation of [Lβ/Lα]Mn-ratio for each sample is large. Thus, [Lβ/Lα]Mn-ratio can not be used for semiquantitative determination of Mn2+/(Mn2++Mn3+)-ratio but gives us qualitative information.\",\"PeriodicalId\":242743,\"journal\":{\"name\":\"Journal of the Mineralogical Society of Japan\",\"volume\":\"81 4 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-11-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the Mineralogical Society of Japan\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.2465/GKK1952.28.159\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Mineralogical Society of Japan","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2465/GKK1952.28.159","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
We have reinvestigated the relationship between the relative intensities of Lα and Lβ X-ray emission peaks, [Lβ/Lα], and Fe2+/Fe3+ or Mn2+/Mn3+-ratios in silicate minerals. For Fe-bearing silicates, two kinds of regression lines were obtained; (1) 0≤[Fe2++/(Fe2++Fe3+)]≤0.74: [Lβ/Lα]Fe=0.1414×[Fe2+/(Fe2++Fe3+)]+0.4121 (R2=0.986), (2) 0.74≤[Fe2+/(Fe2++Fe3+)]≤1.00: [Lβ/Lα]Fe=0.8024×[Fe2+/(Fe2++Fe3+)]-0.0798 (R2=0.973). By using these regression lines, it is possible to estimate semiquantitative Fe2+/(Fe2++Fe3+)-ratio of Fe-silicates containing total FeO more than 5 wt.%. For Mn-bearing silicates, a regression line of [Lβ/Lα]Mn=0.46×[Mn2+/(Mn2++Mn3+)]+0.554 (R2=0.968) was obtained. However, even if samples contain total MnO more than 10 wt.%, standard deviation of [Lβ/Lα]Mn-ratio for each sample is large. Thus, [Lβ/Lα]Mn-ratio can not be used for semiquantitative determination of Mn2+/(Mn2++Mn3+)-ratio but gives us qualitative information.
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