Fe is non stochiometric and has approximate composition F 0.95 o
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?The non-stoichiometry occurs because of the instability in the FeO molecule as undergo the oxidation of Fe+2 to Fe+3 effectively replacing a small portion of Fe+2 with two thirds their number of Fe+3.
Thus for every three "missing" Fe+2 ions, the crystal contains two Fe+3 ions to balance the charge. This change in composition violets the law of constant composition as the composition of the compound usually varies in a continuous manner over a narrow range. Thus FeO becomes a non-stoichiometric compound and the formula is written as Fe(1-x)O, where x is a small number representing the deviation from the "ideal" formula.
Generally, it is written as Fe0.95O or found in the form of FeO.Fe2O3 represented as Fe3O4.
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This is a answer of the question that is name the non stochiometric & write it's composition value.
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