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Thread: Fe2+ and Fe3+ in Chromites

  1. #1 Fe2+ and Fe3+ in Chromites 
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    Hello,

    At the moment I'm writing my Master Thesis. I measured Chromites with the SEM. But the SEM only measures the total Fe content. But lots of diagrams for chromites need Fe2+ or Fe3+ and not the total Fe.
    So I would like to know if there is a possibility to determine Fe2+ and Fe3+ from the total Fe.

    Thank you for your replies


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  3. #2  
    WYSIWYG Moderator marnixR's Avatar
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    shouldn't you use X-ray diffraction to analyse for oxides ?

    had a quick nose around and found the following article :

    Determination of the Fe oxidation state of the Chassigny kaersutite:A microXANES spectroscopic study

    have a look at it + let me know if it's of any use


    Last edited by marnixR; November 23rd, 2012 at 03:46 PM. Reason: further info added
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  4. #3  
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    Hello marnixR,

    unfortunately there is no use. I need quantitative results. Our XRD produces semi quantitative results. This is not enough.

    The next difficult thing is that chromite possesses Fe2+ and Fe3+.

    But thank you for your reply.
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  5. #4  
    WYSIWYG Moderator marnixR's Avatar
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    how about X-ray photoelectron spectroscopy ?

    i see that in the following article it has been used to distinguish Fe2+ from Fe3+ in oxides

    Analysis of XPS spectra of Fe2+ and Fe3+ ions in oxide materials
    "Reality is that which, when you stop believing in it, doesn't go away." (Philip K. Dick)
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