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.

## Contents

* 1 Preparation
* 2 Uses
* 3 Safety
* 4 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 FeCr

4 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.

## References

1. ↑ University of Akron Chemical Database

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Iron compounds

Fe(-II)|

* Na2Fe(CO)4

Fe(0)|

* Fe(CO)5
* Fe2(CO)9
* Fe3(CO)12
* Fe(CO)3CH3COC2H2C6H6

Fe(I)|

* FeH

| Organoiron(I) compounds|

* (C5H5FeCO)2(CO)2

|

Fe(0,II)|

* Fe3C

Fe(II)|

* FeBr2
* FeCl2
* FeF2
* FeI2
* FeH2
* FeMoO4
* FeO
* Fe(OH)2
* FeS
* FeSO4
* FeSe
* FeSeO4
* FeSi2
* FeTiO3
* FeCO3
* FeC2O4
* Fe(C2H3O2)2
* Fe(C3H5O3)2
* FeC6H6O7
* FeC12H22O14
* Fe2CrO4
* Fe3(PO4)2
* H2Fe(CO)4
* Fe(HCO3)2
* Mg2FeH6

| Organoiron(II) compounds|

* Fe(C5H5)2
* Fe(C5H4P(C6H5)2)2
* C4H4Fe(CO)3
* C4H6Fe(CO)3

|

Fe(0,III)|

* Fe3P

Fe(II,III)|

* Fe3O4
* Fe3S4

Fe(III)|

* FeBr3
* FeCl3
* FeF3
* FeI3
* Fe(NO3)3
* Fe(acac)3
* FeOCl
* FeO(OH)
* FePO4
* Fe4(P2O7)3
* Fe2(CrO4)3
* Fe2(C2O4)3
* Fe2O3
* Fe2S3
* Fe2(SO4)3
* FeBO3
* FeB

| Organoiron(III) compounds|

* Fe(C5H5)2BF4
* C6H8O7⋅xFe3+⋅yNH3

|

Fe(VI)|

* K2FeO4
* BaFeO4

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*[CID]: Compound ID
*[H317]: May cause an allergic skin reaction
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