Maghemit Powder Description
Maghemit (Fe2O3, γ-Fe2O3) is a member of the iron oxides family. It exhibits the same structure as magnetite; that is, it is a spinel ferrite and is ferromagnetic. Maghemit can be regarded as Fe(II)-deficient magnetite with the corresponding formula, where A indicates a vacancy, A denotes the tetrahedral arrangement and B represents the octahedral arrangement.
a) (Fe2O3, γ-Fe2O3)
b) Maghemit Chemical Formula: Gamma-Fe+++2O3
c) Maghemit Empirical Formula: Fe3+2O3
Maghemit was named in 1927. It appears blue with a grey tone, white or brown. It crystallises in an isometric system. Maghemit is produced by the topotactic oxidation of magnetite.
Synonyms
Maghemit, ferrimagnetic, synthetic Maghemit, ferrimagnetic iron oxide, Oxymatrin, Somit, spinel ferrite, magnetic Maghemit nanoparticles, iron oxide, magnetite, black iron oxide, CAS# 1309-37-1
Purity
In some cases, various levels of purity ranging between 98% and 99.9% are available.
Form
a) Various granulated and powder forms, including nanoparticles
b) Targets
c) Sintered pieces

Specifications for Maghemit Powder
Molecular Weight (g/mol)
|
159.69
|
Apparent Density (g/cm³)
|
4.9
|
System
|
Isometric
|
RTECS Number
|
NO7400000
|
Magnetism
|
Strongly magnetic
|
Radioactivity
|
Non-radioactive
|
Mohs Hardness @20°C
|
6
|
Transparency
|
Opaque
|
Colour
|
Brown, brick red
|
Morphology
|
Massive
|
Crystallography
|
Tetragonal
|
Classification of Maghemit Powder
Maghemit Powder TSCA (SARA Title III) Status: Varies.
Maghemit Powder CAS Number: CAS No. 1309-37-1
Typical Applications of Maghemit Powder
Maghemit Powder is a ferromagnetic oxide powder. It possesses a spinel structure and is commonly employed in magnetic tapes, for example in the magnetic layer of audio tapes, floppy disks, digital tapes, etc. The particles may be magnetised to represent data. MICR (Magnetic Ink Character Recognition) also utilises iron(III, II) oxide compounds, which are suspended in an ink and read by specialised devices.
Packaging of Maghemit Powder
50 lbs sacks, fibre drums with poly lining, bulk sacks or according to customer specification