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Turnbull's blue's formula

  1. Apr 28, 2015 #1
    1. The problem statement, all variables and given/known data
    In my textbook it's written that turnbull's blue is:
    ## Fe_3^{II}[Fe^{III}(CN)_6]##

    2. Relevant equations

    3. The attempt at a solution
    But Shouldn't it be twice of the complex compound instead of one...to balance the charge.
    I googled it but found the formula of the complex, not of the whole compound.
    Any help appreciable.
  2. jcsd
  3. Apr 28, 2015 #2


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