EKSPERIMENT 

             Iron stone crushed into powders. The powder was washed with distilled water until clear and then dried in an oven at a temperature of 70 °C. The dried powder is was separated with a magnetic separator in other to obtain pure powder Fe₂O₃. 

            Then test the X-ray fluorescence (XRF) to determine the content of the quantitative elements contained in both the iron ore and which have not been extracted and test DTA-TGA to determine element mass which is reduced due to temperature increase. 

           After that iron powder synthesized by co-precipitation method, in which the iron powder which has been extracted Fe₂O₃ was dissolved in 60 ml HCl 37% M and stirred with a speed of 650 rpm at 70 °C during 30 minutes. Then FeCl3 solution is formed, later dripped gradually NaOH solution at temperatures 100 °C until precipitate is formed Fe(OH)3.

         After that precipitate was washed repeatedly with distilled water until pH 7. subsequently precipitated Fe (OH) 3 produced, then filtered, dried and calcined at a temperature of 700 ° C, 800 ° C, 860 ° C, 900 ° C with holding time each sample was 5 hours. The results were characterized with UV-Vis spectrometer to determine absorbances.