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Raw Umber

OxideAnalysisFormula
CaO5.00%0.642
MgO2.00%0.358
Al2O33.00%0.212
SiO213.00%1.559
Fe2O351.00%2.297
MnO13.00%1.321
H2O13.00
Oxide Weight627.01
Formula Weight720.70
If this formula is not unified correctly please contact us.

Raw Umber vs. Burnt Umber

Raw Umber vs. Burnt Umber

These are the same material, however the one on the right has been burnt to 600F. At this surprisingly low temperature the color transforms into a deep redish brown.

Out Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Raw Umber" descrip="" searchkey="" loi="0.00" casnumber=""> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="5.000" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="2.000" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="3.000" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="13.000" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="51.000" tolerance=""/> <oxide symbol="MnO" name="Manganous Oxide" status="" percent="13.000" tolerance=""/> </oxides> <volatiles> <volatile symbol="H2O" name="Water" percent="13.000" tolerance=""/> </volatiles> </material>


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