The mineral pyrite, or iron pyrite, forbye kent as fuil's gowd, is an iron sulfide wi the formula FeS2. This mineral's metallic luster an fauch brass-yellae hue gie it a superficial resemblance tae gowd (that's hou it gets the weel-kent eikname o fuil's gowd). The colour haes led tae the eiknames brass, brazzle, an Brazil an aw, primarily uised tae refer tae pyrite foond in coal.[5][6]
Quick facts General, Category ...
| Pyrite |
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 Pyrite cubic crystals |
| General |
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| Category | Sulfide mineral |
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Formula
(repeatin unit) | FeS2 |
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| Strunz clessification | 02.EB.05a |
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| Dana clessification | 2.12.1.1 |
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| Creestal seestem | Isometric |
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| Space group | Isometric diploidal
Space group: Pa3
H-M seembol: 2/m3 |
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| Unit cell | a = 5.417 Å, Z=4 |
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| Identification |
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| Formula mass | 119.98 g/mol |
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| Colour | Fauch brass-yellae reflective; tarnishes darker an iridescent |
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| Creestal habit | Cubic, faces mey be striatit, but frequently octahedral an pyritohedron an aw. Aften inter-grown, massive, radiatit, granular, globular, an stalactitic. |
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| Twinnin | Penetration an contact twinnin |
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| Cleavage | Indistinct on {001}; pairtins on {011} an {111} |
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| Fractur | Vera uneven, whiles conchoidal |
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| Tenacity | Brickle |
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| Mohs scale haurdness | 6–6.5 |
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| Skinkle | Metallic, glistenin |
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| Streak | Greenish-black tae brounish-black |
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| Diaphaneity | Opaque |
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| Speceefic gravity | 4.95–5.10 |
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| Density | 4.8–5 g/cm3 |
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| Fusibility | 2.5–3 to a magnetic globule |
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| Solubility | Insoluble in watter |
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| Ither chairacteristics | paramagnetic |
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| References | [1][2][3][4] |
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