Answer
Iron (III) carbonate.
Work Step by Step
Carbonate ( $CO_{3}^{-2}$) has a -2 charge and the charge on Iron ion is +3. In order to balance these charges, 2 atoms of $Fe^{3+}$ should be present and 3 atoms of $CO_{3}^{-2}$ should be present. Thus, the chemical formula would be $Fe_{2} (CO_{3}) _{3}$. Therefore the name of this compound is Iron (III) carbonate.
