Chemistry:Iron(II) chromite

Iron(II) chromite

Names
IUPAC name Iron(2+) chromite
Identifiers
CAS Number	1308-31-2
3D model (JSmol)	Interactive image
EC Number	215-159-3
PubChem CID	166600
RTECS number	GB4000000
InChI InChI=1S/Cr.Fe.3O/q2*+3;3*-2 Key: HEQBUZNAOJCRSL-UHFFFAOYSA-N
SMILES [O-2].[O-2].[O-2].[Cr+3].[Fe+3]
Properties
Chemical formula	FeCr2O4
Molar mass	223.83 g/mol
Appearance	Brown-black solid
Density	4.97 g/cm3
Melting point	2,190 to 2,270 °C (3,970 to 4,120 °F; 2,460 to 2,540 K)
Solubility in water	insoluble
Solubility	Slightly soluble in acid
Refractive index (nD)	2.16
Structure
Crystal structure	cubic
Hazards
GHS pictograms
GHS hazard statements	H317
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Iron(II) chromite is an inorganic compound with the chemical formula FeCr₂O₄.

Preparation

It is created by the sintering of chromium(III) oxide and iron(II) oxide at 1600 °C. It also occurs in nature as the mineral chromite, though with many impurities.

Uses

Chromite, a FeCr
2O
4 containing mineral

It is used as a commercial source of chromium and its compounds. It is also used as a catalyst in the synthesis of hydrogen (H₂) from the reaction between carbon monoxide and water vapor.

Safety

Its dust particles may cause irritation; inhalation and ingestion of its dust should be avoided. Swallowing larger amounts may cause injury.