Iron(III) chromate

Iron(III) chromate[1]
Names
IUPAC name
iron(III) chromate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.588 Edit this at Wikidata
EC Number
  • 233-661-0
UNII
  • InChI=1S/3Cr.2Fe.12O/q;;;2*+3;;;;;;;6*-1
    Key: OXLBLZDGMWMXSM-UHFFFAOYSA-N
  • [O-][Cr](=O)(=O)[O-].[O-][Cr](=O)(=O)[O-].[O-][Cr](=O)(=O)[O-].[Fe+3].[Fe+3]
Properties
Fe2(CrO4)3
Molar mass 459.6808 g/mol
Appearance yellow powder
reacts, see also solubility chart
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 toxic (contain Cr(VI))
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Iron(III) chromate is the iron(III) salt of chromic acid with the chemical formula Fe2(CrO4)3.

Discovery

Iron(III) chromate was discovered by Samuel Hibbert-Ware in 1817 while visiting Shetland.[2]

Production

It may be formed by the salt metathesis reaction of potassium chromate and iron(III) nitrate, which gives potassium nitrate as byproduct.

2 Fe(NO3)3 + 3 K2CrO4 → Fe2(CrO4)3 + 6 KNO3

It also can be formed by the oxidation by air of iron and chromium oxides in a basic environment:

4 Fe2O3 + 6 Cr2O3 + 9 O2 → 4 Fe2(CrO4)3

References

  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. pp. 4–63. ISBN 0-8493-0594-2.
  2. ^ "Search - Archives Hub".(full citation required)


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