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Natural Red Iron Oxide

Alternate Names: Indian Red

OxideAnalysisFormula
CaO3.47%0.538
MgO0.05%0.011
K2O0.74%0.068
Na2O2.07%0.291
P2O51.50%0.092
TiO20.09%0.010
Al2O34.00%0.341
SiO217.70%2.563
Fe2O365.40%3.557
LOI4.96
Oxide Weight826.92
Formula Weight870.08
If this formula is not unified correctly please contact us.

Natural red iron oxide is delivered as a red powder or in lump form. It is used in paint, rubber and ceramics.

The analysis given here is only an example, this is a natural material and of course the chemistry is widely variable from place to place. SO3 can be present in significant amounts. Iron content will vary from 40 to 70% and grades are sold according to its amount. Here is another example:

CaO: 0.90
Na2O: 0.80
Al2O3: 1.34
SiO2: 18.32
SO3: 1.97
L.O.I: 2.10
Fe2O3: 64.00


Natural Red Iron Oxide powder

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By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Natural Red Iron Oxide" descrip="" searchkey="Indian Red" loi="0.00" casnumber="1345-25-1"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="3.470" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.050" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.740" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="2.070" tolerance=""/> <oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="1.500" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.090" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="4.000" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="17.700" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="65.400" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="4.960" tolerance=""/> </volatiles> </material>


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