Synthetic Compounds Group

From the standards library of the SPI Supplies and the C. M. Taylor Company

# AS2070-AB

Chromium Oxide


ElementWt % OxideWt %
O 31.58
Cr 68.42Cr2O3 100.00

Sum100.0 Sum100.0

Purity 99.7%
Alfa Aesar, MA, USA
This is a reflected light micrograph of a a synthetic, polished, carbon coated chromium oxide crystal. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument, and in this case reminds the user that this synthetic material has two phases - minor amounts of metallic chromium mixed with the oxide. This is a good standard for high concentrations of chromium. We used to use natural chromite but it was difficult to find homogeneous crystals. Chromite is now available in our minerals collection.

Name Description SPI # Each
Chromium Oxide SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS2070-AB $
Chromium Oxide SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS2075-AB $

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