Iron(III) oxide

  • Hematite ( mineral )
  • Red iron oxide
  • Diiron trioxide
  • Eisensequioxid
  • Purpurerz / pyrite, sulfuric acid residue extraction of pyrite

Red to black crystals

Fixed

5.24 g · cm -3

1565 ° C

Insoluble in water

Attention

1.5 mg · m -3 ( aerosol content )

Template: Infobox chemical / molecular formula search is not possible

Iron (III ) oxide is a stable oxide of iron. It is, inter alia, a part of the grate, causing its color.

Production

It is possible to gain, among others, red iron oxide by firing iron ( III) oxyhydroxide. Here, yellow iron oxide is heated to over 200 ° C, forming water vapor.

Meaning and usage

Iron (III ) oxide is used as the iron oxide pigment and designated. The hue varies approximately between red orange and deep red; Also, it is the main component of the natural red earth.

A magnetizable material is iron (III ) oxide is used as the recording layer of tapes. Iron (III ) oxide is also part of superparamagnetic iron oxide nanoparticles, which are used in magnetic resonance imaging including molecular imaging.

It is also used in the thermite process in combination with aluminum:

Occurrence

Iron (III ) oxide is used as mineral in nature in two modifications:

  • Hematite ( blood stone) Fe2O3, trigonal ( pseudohexagonales ) crystal system
  • Maghemite ( maghemite ) Fe2O3, cubic crystal system
CAS registry number Aluminium Iron(II,III) oxide Iron(II) oxide
236644
de