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Thread: discoloration of sample in high temperature solid state methods

  1. #1 discoloration of sample in high temperature solid state methods 
    Eun
    Eun is offline
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    Well, I'm making YVO4 sample in Solid state methods, and there was uneven discolouration after second heating process.
    The sample is 2 grams, heated in a furnace at 800*C.. I don't think this is because of humidity.. what was the problem?


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    Bullshit Intolerant PhDemon's Avatar
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    It's a long time (1996!) since I did any solid state chemistry but depending on your starting materials it could be that the vanadium hasn't been fully oxidised and you have impurities of a mixed oxide with vanadium(II) or vanadium(III) rather than vanadium(V). Try heating it again for longer.


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    Bullshit Intolerant PhDemon's Avatar
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    It could also be because your starting materials weren't a homogeneous mixture before heating...
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