Carrollite
CuCo2S4IMA symbol: Cligrandfathered
Carrollite is a sulfide or sulfosalt mineral with the formula CuCo2S4, crystallizing in the cubic system. It has a Mohs hardness of 5.5, typically gray or red in color, with a metallic luster, a specific gravity of 4.85.
Photos
Crystallography
| Crystal system | cubic crystal systemWikidata (CC0) |
|---|---|
| Space group | F d -3 m :2 |
| Cell (Å, °) | a = 9.478, b = 9.478, c = 9.478; α = 90, β = 90, γ = 90 |
| Cell volume | 851.432 ų, Z = 8 |
| Axial ratios | 1.0000:1:1.0000calculated from COD 9009688 |
| Source structure | COD 9009688 (Journal of Physics D: Applied Physics, 1974) — 1 of 4 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.858 | 1.675 | 1.824 | 2.369 | 3.351 | 1.234 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 79.5 | 51.6 | 41.5 | 36.3 | 16.4 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9009688; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 4.832 g/cm³calculated from COD 9009688 |
|---|---|
| Hardness (Mohs) | 5.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 4.85 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | gray, redsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | metallicsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 309.67 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Cu 20.52%, Co 38.06%, S 41.42% |
Classification
| Nickel-Strunz (10th) | 2.DA.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.DA.05Wikidata (CC0) |
| Dana (8th) | 2.10.1.2Wikidata (CC0) |