පයිරයිට්
පයිරයිට් (ඉංග්රීසි: iron pyrite, pyrite, fool's gold, /ˈpaɪraɪt/), ඛණිජය, යනු යකඩ සල්ෆයිඩයකි.
මෙහි රසායනික සූත්රය FeS2 (iron (II) disulfide) වේ. පයිරයිට් වඩාත්ම සුලබ සල්ෆයිඩ ඛණිජය වේ.
| පයිරයිට් | |
|---|---|
 Intergrowth of lustrous, cubic crystals of pyrite, with some surfaces showing characteristic striations, from Huanzala mine, Ancash, Peru. Specimen size: 7.0 × 5.0 × 2.5 cm | |
| General | |
| Category | සල්ෆයිඩ් ඛණිජ |
| රසායනික සූත්රය | FeS2 |
| Strunz classification | 2.EB.05a |
| Dana classification | 2.12.1.1 |
| Crystal symmetry | Pa3 |
| Unit cell | a = 5.417 Å, Z = 4 |
| Identification | |
| අණුක ස්කන්ධය | 119.98 g/mol |
| පාට / පැහැය | Pale brass-yellow reflective; tarnishes darker and iridescent |
| Crystal habit | Cubic, faces may be striated, but also frequently octahedral and pyritohedral. Often inter-grown, massive, radiated, granular, globular, and stalactitic. |
| Crystal system | Cubic |
| Twinning | Penetration and contact twinning |
| Cleavage | Indistinct on {001}; partings on {011} and {111} |
| Fracture | Very uneven, sometimes conchoidal |
| Tenacity | භංගුර |
| Mohs scale hardness | 6–6.5 |
| Luster | Metallic, glistening |
| Streak | Greenish-black to brownish-black |
| Diaphaneity | Opaque |
| Specific gravity | 4.95–5.10 |
| ඝනත්වයy | 4.8–5 g/cm3 |
| Fusibility | 2.5–3 to a magnetic globule |
| Solubility | Insoluble in water |
| Other characteristics | paramagnetic |
| References | |
ආශ්රිත
- Iron–sulfur world hypothesis
- Sulfur isotope biogeochemistry
මූලාශ්ර
පයිරයිට් හා සබැඳි මාධ්ය විකිමාධ්ය කොමන්ස් හි ඇත.
- Educational article about the famous pyrite crystals from the Navajun Mine
- How Minerals Form and Change "Pyrite oxidation under room conditions".
- Poliakoff, Martyn (2009). "Fool's Gold". The Periodic Table of Videos. University of Nottingham.
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