Pyrite
FeS2IMA symbol: Pygrandfathered
Pyrite is a sulfide or sulfosalt mineral with the formula FeS2, crystallizing in the cubic system. It has a Mohs hardness of 6-6.5, typically yellow in color, with a metallic luster, a specific gravity of 4.95-5.1. Its streak is black or brown.
Photos
Crystallography
| Crystal system | cubic crystal systemWikidata (CC0) |
|---|---|
| Space group | P a -3 |
| Cell (Å, °) | a = 5.416, b = 5.416, c = 5.416; α = 90, β = 90, γ = 90 |
| Cell volume | 158.868 ų, Z = 4 |
| Axial ratios | 1.0000:1:1.0000calculated from COD 9013069 |
| Source structure | COD 9013069 (International Journal of Coal Geology, 2007) — 1 of 11 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 1.633 | 2.708 | 2.422 | 1.915 | 2.211 | 3.127 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 92.1 | 53.8 | 50 | 44.8 | 38 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9013069; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 5.016 g/cm³calculated from COD 9013069 |
|---|---|
| Hardness (Mohs) | 6single sourceWikidata (CC0) 6-6.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 4.95-5.1 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | blacksingle sourceWikidata (CC0) black, brown, greensingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | metallicsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 119.97 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Fe 46.55%, S 53.45% |
Classification
| Nickel-Strunz (10th) | 2.EB.05aWikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.EB.05aWikidata (CC0) |
| Dana (8th) | 2.12.1.1Wikidata (CC0) |