Iron(II) chromite

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

Iron(II) chromite

Names
IUPAC name Iron(2+) chromite
Identifiers
CAS Number	1308-31-2
3D model (JSmol)	Interactive image
ChemSpider	65793926
ECHA InfoCard	100.013.782
EC Number	215-159-3
PubChem CID	129627662
RTECS number	GB4000000
UNII	W86U2Q2334
CompTox Dashboard (EPA)	DTXSID10892418
InChI InChI=1S/2Cr.Fe.4O/q;;+2;;;2*-1 Key: VUIWSEWFMMYPHW-UHFFFAOYSA-N
SMILES O=[Cr][O-].O=[Cr][O-].[Fe+2]
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 labelling:
Pictograms
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

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 FeCr₂O₄ containing mineral

It is used as a commercial source of chromium and its compounds.^[1] 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.