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Natural Red Iron Oxide

Alternate Names: Indian Red

Oxide Analysis Formula
SiO2 17.70% 2.56
Al2O3 4.00% 0.34
Fe2O3 65.40% 3.56
TiO2 0.09% 0.01
CaO 3.47% 0.54
MgO 0.05% 0.01
Na2O 2.07% 0.29
K2O 0.74% 0.07
P2O5 1.50% 0.09
LOI4.96%
Oxide Weight 826.92
Formula Weight 870.08

Notes

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

Related Information

Natural Red Iron Oxide powder

Links

Materials Iron Oxide Black
Materials YLO-1888D Yellow Iron Oxide
Materials Iron Oxide Yellow
Materials Iron Oxide Red
Hazards Iron oxide and Hematite
Typecodes Colorant
Metallic based materials that impart fired color to glazes and bodies.

By Tony Hansen


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