Magnetite Granular

Alternate Names: FERROSO-FERRIC OXIDE, FEROSIC OXIDE

Oxide	Analysis	Formula
Fe2O3	66.17%	1.00
FeO	33.83%	1.00
Oxide Weight		241.80
Formula Weight		241.80

Notes

It is not to be confused with brown Fe3O₄ mixed ferrous-ferric iron oxide. Unlike the much softer black and red iron oxide, this material is useful in granular form to introduce specking into bodies and glazes. Many other materials are available as speckling agents.

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Typecodes	Colorant Metallic based materials that impart fired color to glazes and bodies.
Minerals	Magnetite A black, hard, dense and stable crystalline mineral form of iron oxide.
Materials	Manganese Granular In ceramics, it is used primarily in clays and glazes to achieve fired speckle (including the brick industry).
Materials	Granular Rutile The same material as milled rutile, but ground only to granular size.
Materials	Iron Pyrite
Materials	Granular Ilmenite

Data

Hardness (Moh)	6.5
Frit Softening Point	1538C D
Density (Specific Gravity)	5.18

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