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Iron Chromate

Formula: FeO.Cr2O3
Alternate Names: Ferric Chromate, Chromite, Chromate of Iron

OxideAnalysisFormula
Cr2O367.85%1.000
FeO32.40%0.887
Oxide Weight224.58
Formula Weight224.58
If this formula is not unified correctly please contact us.
DENS - Density (Specific Gravity) 4.50
GSPT - Frit Softening Point 1800C M

A dense compound of iron and chromium. It is very refractory in oxidation, even with 50% borax and zero-alumina Ferro frit 3134 it does not melt. It is used in glazes to produce gray (with feldspar), brown (with zinc), red (with tin) or black depending on the base glaze and percentage and other coloring oxides present. Often used in underglazes, engobes and clay bodies.

Highly toxic in absorption, inhalation, and ingestion.


How do metal oxides compare in their degrees of melting?

How do metal oxides compare in their degrees of melting?

Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.

Out Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Iron Chromate" descrip="" searchkey="Ferric Chromate, Chromite, Chromate of Iron" loi="0.00" casnumber=""> <oxides> <oxide symbol="Cr2O3" name="Chrome Oxide" status="" percent="67.850" tolerance=""/> <oxide symbol="FeO" name="Ferrous Oxide" status="" percent="32.400" tolerance=""/> </oxides> </material>


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