| Identification | Back Directory | [Name]
dichromium iron tetraoxide | [CAS]
1308-31-2 | [Synonyms]
Chromite.
CHROMITEORE
FERROCHROMITE
iron chromate
iron chromite
CHROMITEOREROAST
CHROMITE(MINERAL)
Chromite (Cr2FeO4)
chromite processed
chromite homog mineral
chromite (mineral) (cr2feo4)
iron(II) chromium(III) tetraoxide | [EINECS(EC#)]
215-159-3 | [Molecular Formula]
Cr2FeO4 | [MOL File]
1308-31-2.mol | [Molecular Weight]
125.86 |
| Chemical Properties | Back Directory | [Definition]
A natural oxide of ferrous iron and chromium, sometimes with magnesium and aluminum present. Usually occurs in magnesium and iron-rich igneous
rocks. | [Appearance]
Iron-black to brownish-black color,
dark-brown streak, metallic to submetallic luster.
Mohs hardness 5.5. | [density ]
5.000 | [form ]
black cubic crystals | [color ]
black cubic crystals, crystalline | [Water Solubility ]
insoluble H2O [CRC10] | [Dielectric constant]
4.0（Ambient） | [Uses]
Only commercial source of chromium and its
compounds. | [EPA Substance Registry System]
Chromite (Cr2FeO4) (1308-31-2) |
| Hazard Information | Back Directory | [Chemical Properties]
Iron-black to brownish-black color,
dark-brown streak, metallic to submetallic luster.
Mohs hardness 5.5. | [Hazard]
A confirmed carcinogen. | [Physical properties]
Habit: massive, granular, nuggets.
Color: black or brownish black.
Luster: metallic.
Diaphaneity: opaque.
Streak: brown.
Cleavage: none.
Twinning: {111}.
Fracture: uneven to
conchoidal.
Others: weakly magnetic.
Thermal conductivity of 1.73–2 W.m–1K–1 | [Industrial uses]
Only commercial source of chromium used in the metallurgical industry (85%) mainly as Fe–Cr for steelmaking, in the refractory and foundry market (8%) and in the chemical industry (7%). |
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