Magnetite
Magnetite is a rock mineral an ane o the main airn ures.
| Magnetite | |
|---|---|
 Magnetite frae Bolivie | |
| General | |
| Category |
|
| Formula (repeatin unit) | iron(II,III) oxide, Fe2+Fe3+2O4 |
| Strunz clessification | 4.BB.05 |
| Creestal seestem | Isometric |
| Creestal cless | Hexoctahedral (m3m) H-M seembol: (4/m 3 2/m) |
| Space group | Fd3m |
| Unit cell | a = 8.397 Å; Z = 8 |
| Identification | |
| Colour | Black, gray wi brounish tint in reflectit sun |
| Creestal habit | Octahedral, fine granular tae massive |
| Twinnin | On {Ill} as baith twin an composeetion plane, the spinel law, as contact twins |
| Cleavage | Indistinct, pairtin on {Ill}, verra guid |
| Fractur | Uneven |
| Tenacity | Brittle |
| Mohs scale haurdness | 5.5–6.5 |
| Skinkle | Metallic |
| Streak | Black |
| Diaphaneity | Opaque |
| Speceefic gravity | 5.17–5.18 |
| Solubility | Dissolves slowly in hydrochloric acid |
| References | [1][2][3][4] |
| Major varieties | |
| Lodestane | Magnetic wi definite north an sooth poles |
References
eedit- ↑ "Handbook of Mineralogy" (PDF). Archived frae the original (PDF) on 24 September 2015. Retrieved 18 Mairch 2018.
- ↑ Mindat.org Mindat.org
- ↑ Webmineral data
- ↑ Hurlbut, Cornelius S.; Klein, Cornelis (1985). Manual of Mineralogy (20th ed.). Wiley. ISBN 0-471-80580-7.