Magnetite is a rock mineral an ane o the main airn ures.
Quick facts General, Category ...
| Magnetite |
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 Magnetite frae Bolivie |
| General |
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| Category |
- Oxide minerals
- Spinel group
- Spinel structural group
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Formula
(repeatin unit) | iron(II,III) oxide, Fe2+Fe3+2O4 |
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| Strunz clessification | 4.BB.05 |
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| Creestal seestem | Isometric |
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| Creestal cless | Hexoctahedral (m3m)
H-M seembol: (4/m 3 2/m) |
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| Space group | Fd3m |
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| Unit cell | a = 8.397 Å; Z = 8 |
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| Identification |
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| Colour | Black, gray wi brounish tint in reflectit sun |
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| Creestal habit | Octahedral, fine granular tae massive |
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| Twinnin | On {Ill} as baith twin an composeetion plane, the spinel law, as contact twins |
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| Cleavage | Indistinct, pairtin on {Ill}, verra guid |
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| Fractur | Uneven |
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| Tenacity | Brittle |
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| Mohs scale haurdness | 5.5–6.5 |
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| Skinkle | Metallic |
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| Streak | Black |
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| Diaphaneity | Opaque |
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| Speceefic gravity | 5.17–5.18 |
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| Solubility | Dissolves slowly in hydrochloric acid |
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| References | [1][2][3][4] |
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| Major varieties |
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| Lodestane | Magnetic wi definite north an sooth poles |
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