Pyrite
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]
| Pyrite | |
|---|---|
 Pyrite cubic crystals | |
| General | |
| Category | Sulfide mineral |
| Formula (repeatin unit) | FeS2 |
| Strunz clessification | 02.EB.05a |
| Dana clessification | 2.12.1.1 |
| Creestal seestem | Isometric |
| Space group | Isometric diploidal Space group: Pa3 H-M seembol: 2/m3 |
| Unit cell | a = 5.417 Å, Z=4 |
| Identification | |
| Formula mass | 119.98 g/mol |
| Colour | Fauch brass-yellae reflective; tarnishes darker an iridescent |
| Creestal habit | Cubic, faces mey be striatit, but frequently octahedral an pyritohedron an aw. Aften inter-grown, massive, radiatit, granular, globular, an stalactitic. |
| Twinnin | Penetration an contact twinnin |
| Cleavage | Indistinct on {001}; pairtins on {011} an {111} |
| Fractur | Vera uneven, whiles conchoidal |
| Tenacity | Brickle |
| Mohs scale haurdness | 6–6.5 |
| Skinkle | Metallic, glistenin |
| Streak | Greenish-black tae brounish-black |
| Diaphaneity | Opaque |
| Speceefic gravity | 4.95–5.10 |
| Density | 4.8–5 g/cm3 |
| Fusibility | 2.5–3 to a magnetic globule |
| Solubility | Insoluble in watter |
| Ither chairacteristics | paramagnetic |
| References | [1][2][3][4] |
References
eedit- ↑ Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., John Wiley and Sons, New York, pp 285–286, ISBN 0-471-80580-7
- ↑ Pyrite on webmineral. Webmineral.com. Retrieved on 2011-05-25.
- ↑ Pyrite on. Mindat.org. Retrieved on 2011-05-25.
- ↑ Handbook of Mineralogy. (PDF) . Retrieved on 2011-05-25.
- ↑ Julia A. Jackson, James Mehl and Klaus Neuendorf, Glossary of Geology, American Geological Institute (2005) p. 82.
- ↑ Albert H. Fay, A Glossary of the Mining and Mineral Industry, United States Bureau of Mines (1920) pp. 103–104.