Constituent
- Name
- Oxides
- IMA name
- Hematite
- Class
- non-silicate mineral
- Compound type
- oxide-hydroxide
- Comments
- Some small oxide (e.g. Hematite, Illemnite, Magnetite) crystals. Content = trace.
- Relevance
- unknown
- Arrangement
- unknown
- Formula
- $Fe_2O_3$
- Chemical formula
- Fe2O3
- Elemental formula
- (Fe3+)2 O3
- Isotope mixture type
- terrestrial abundance
- Oxides
-
Formula $Fe_{2}O_{3}$ Mass fraction (%) 100.0
Strunz
- Class
- oxides - hydroxides - arsenites (04)
- Division
- metal:oxygen = 2:3, 3:5, and similar (04.C)
- Family
- with medium-sized cations (04.CB)
- Code
- 04.CB.05
Dana
- Major class
- oxides and hydroxides (III)
- Class
- simple oxides (04)
- Type
- with a cation charge of 3+ (A+++2O3) (04.03)
- Group
- Corundum-Hematite group (Rhombohedral: R-3c) (04.03.01)
- Code
- 04.03.01.02
- Phase type
- crystalline
- Molar mass
- 159.69 $g/mol$
- Density
- 5.3 $g/cm^3$
- Refringence type
- uniaxial
- Refringence sign
- negative
- Birefringence
- 0.280
- Refraction index $n_{\alpha}$
- 3.15 - 3.22
- Refraction index $n_{\beta}$
- 2.87 - 2.94
- Color
- reddish gray, black, blackish red
- Diaphaneity
- subtranslucent to opaque
- Luster
- metallic