Hematite Property

Melting point:

1538 °C

Density 

5.24

Flash point:

>230 °F

form 

Powder

color 

red

Dielectric constant

1.9（Ambient）

CAS DataBase Reference

1317-60-8(CAS DataBase Reference)

IARC

3 (Vol. 1, Sup 7) 1987

EPA Substance Registry System

Hematite (1317-60-8)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26

WGK Germany 

-

RTECS 

NO7400000

Hazardous Substances Data

1317-60-8(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Hematite Chemical Properties,Usage,Production

General Description

Hematite, also spelled as haematite, is the mineral form of iron(III) oxide (Fe2O3), one of several iron oxides. It is the oldest known Fe oxide mineral and is widespread in rocks and soils. The name hematite is derived from the Greek word for blood α?μα haima, due to the red coloration found in some varieties of hematite.The red chalk writing of this mineral was one of the earliest in the history of humans.Rich deposits of hematite have been found on the island of Elba that have been mined since the time of the Etruscans.

Description

Iron(III) oxide is known in mineral form as hematite, which is the primary form of iron ore. It is also known simply as iron oxide or ferric oxide and is what is colloquially called rust when referring to the corrosion of iron objects.
Iron (III) oxide exists in mineral form as hematite.It is 70% iron and is the primary source of iron ore in the world. About 90% of the iron mined in the United States is hematite. World production of this ore is more than 1 billion tons. Magnetite and taconite are two other primary iron oxide minerals used as iron ore.The name hematite comes from the blood-red color of powdered hematite.

Chemical Properties

Steel gray to black crystals or as ready earthy material.

Chemical Properties

Hematite is a noncombustible, black to black red or brick-red mineral (iron ore) composed mainly of ferric oxide, Fe2O3. Ferric oxide

Uses

Definition

Fe 2O3 with impurities.

Definition

A mineral form of iron(III) oxide. It is the principal ore of iron.

Definition

A mineral form ofiron(III) oxide, Fe₂O₃. It is the mostimportant ore of iron and usually occursin two main forms: as a massivered kidney-shaped ore (kidney ore)and as grey to black metallic crystalsknown as specular iron ore.Haematite is the major red colouringagent in rocks; the largest depositsare of sedimentary origin. Inindustry haematite is also used as apolishing agent (jeweller’s rouge) andin paints.

Hazard

Benign pneumoconiosis.

Flammability and Explosibility

Non flammable

Potential Exposure

Hematite; as an iron ore composed mainly of ferric oxide, is a major source of iron and is used as a pigment for rubber, paints, paper, linoleum, ceramics, dental restoratives; and as a polishing agent for glass and pre cious metals. It is also used in electrical resistors, semiconduc tors, magnets, and as a catalyst. Human exposure to hematite from underground hematite mining is principally through inhalation and/or ingestion of dusts. No estimates are available concerning the number of underground miners exposed.

Structure and conformation

α-Fe2O3, hematite [1317-60-8], has a corundum structure with color changes from light red to dark violet with increasing particle size.

Incompatibilities

Contact with hydrogen peroxide, ethyl ene oxide, calcium hypochlorite will cause explosion. Violent reaction with powdered aluminum; hydrazine, hydrogen trisulfide.

References

1.https://en.wikipedia.org/wiki/Iron(III)_oxide#Uses
2.http://study.com/academy/lesson/iron-iii-oxide-formula-molar-mass-uses-solubility.html 3.http://www.sigmaaldrich.com/catalog/product/sigald/12342?lang=zh&region=CN 4.http://creationwiki.org/Iron_oxide 5.http://chemistry-reference.com/q_compounds.asp?CAS=1309-37-1 6./productchemicalpropertiescb31456867.htm