Chalcopyrite
CuFeS2IMA symbol: Ccpgrandfathered
Chalcopyrite is a sulfide or sulfosalt mineral with the formula CuFeS2, crystallizing in the tetragonal system. It has a Mohs hardness of 3.5-4, typically white, black or yellow in color, with a metallic luster, a specific gravity of 9.44-9.85. Its streak is white or black.
Photos
Crystallography
| Crystal system | tetragonal crystal systemWikidata (CC0) |
|---|---|
| Space group | I -4 2 d |
| Cell (Å, °) | a = 5.29, b = 5.29, c = 10.4217; α = 90, β = 90, γ = 90 |
| Cell volume | 291.642 ų, Z = 4 |
| Axial ratios | 1.0000:1:1.9701calculated from COD 9015234 |
| Source structure | COD 9015234 (The Canadian Mineralogist, 2011) — 1 of 8 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.039 | 1.856 | 1.593 | 1.87 | 1.575 | 1.205 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 39.4 | 25.6 | 20.2 | 12.4 | 9.5 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9015234; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 4.18 g/cm³calculated from COD 9015234 |
|---|---|
| Hardness (Mohs) | 3.5single sourceWikidata (CC0) 3.5-4single sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Specific gravity | 9.44-9.85 g/cm3single sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Color | black, white, yellowsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Streak | black, white, yellowsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Luster | metallicsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
Chemistry (calculated)
| Molecular weight | 183.52 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Cu 34.63%, Fe 30.43%, S 34.94% |
Classification
| Nickel-Strunz (10th) | 2.CB.10aWikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.CB.10aWikidata (CC0) |
| Dana (8th) | 2.9.1.1Wikidata (CC0) |