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
LOI	4.96%	n/a
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 Red iron oxide is the most common colorant used in ceramic bodies and glazes. As a powder, it is available in red, yellow, black and other colors.
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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