Bornite
Cu5FeS4IMA symbol: Bnapproved
Bornite is a sulfide or sulfosalt mineral with the formula Cu5FeS4, crystallizing in the orthorhombic system. It has a Mohs hardness of 3, typically brown or red in color, with a metallic luster, a specific gravity of 5.071. Its streak is black or gray.
Photos
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | F -4 3 m |
| Cell (Å, °) | a = 10.7, b = 10.7, c = 10.7; α = 90, β = 90, γ = 90 |
| Cell volume | 1225.04 ų, Z = 16 |
| Axial ratios | 1.0000:1:1.0000calculated from COD 9003724 |
| Source structure | COD 9003724 (American Mineralogist, 2005) — 1 of 9 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 1.892 | 2.675 | 3.089 | 1.092 | 6.178 | 3.226 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 36.9 | 34.3 | 30.6 | 27 | 17.3 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9003724; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 5.358 g/cm³calculated from COD 9003724 |
|---|---|
| Hardness (Mohs) | 3single sourceWikidata (CC0) 3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 5.071 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | brown, redsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | black, graysingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | metallicsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 501.84 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Cu 63.31%, Fe 11.13%, S 25.56% |
Classification
| Nickel-Strunz (10th) | 2.BA.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.BA.10Wikidata (CC0) |
| Dana (8th) | 2.5.2.1Wikidata (CC0) |