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Pyrite cubic crystals
CategorySulfide mineral
(repeatin unit)
Strunz clessification02.EB.05a
Dana clessification2.12.1.1
Creestal seestemIsometric
Space groupIsometric diploidal
Space group: Pa3
H-M seembol: 2/m3
Unit cella = 5.417 Å, Z=4
Formula mass119.98 g/mol
ColourFauch brass-yellae reflective; tarnishes darker an iridescent
Creestal habitCubic, faces mey be striatit, but frequently octahedral an pyritohedron an aw. Aften inter-grown, massive, radiatit, granular, globular, an stalactitic.
TwinninPenetration an contact twinnin
CleavageIndistinct on {001}; pairtins on {011} an {111}
FracturVera uneven, whiles conchoidal
Mohs scale haurdness6–6.5
SkinkleMetallic, glistenin
StreakGreenish-black tae brounish-black
Speceefic gravity4.95–5.10
Density4.8–5 g/cm3
Fusibility2.5–3 to a magnetic globule
SolubilityInsoluble in watter
Ither chairacteristicsparamagnetic

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]

References[eedit | eedit soorce]

  1. 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
  2. Pyrite on webmineral. Retrieved on 2011-05-25.
  3. Pyrite on. Retrieved on 2011-05-25.
  4. Handbook of Mineralogy. (PDF) . Retrieved on 2011-05-25.
  5. Julia A. Jackson, James Mehl and Klaus Neuendorf, Glossary of Geology, American Geological Institute (2005) p. 82.
  6. Albert H. Fay, A Glossary of the Mining and Mineral Industry, United States Bureau of Mines (1920) pp. 103–104.