Stibnite
Sb2S3IMA symbol: Sbngrandfathered
Stibnite is a sulfide or sulfosalt mineral with the formula Sb2S3, crystallizing in the orthorhombic system. It has a Mohs hardness of 2, typically black or gray in color, with a metallic luster, a specific gravity of 2.16. Its streak is black or gray.
Photos
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P n m a |
| Cell (Å, °) | a = 11.311, b = 3.836, c = 11.229; α = 90, β = 90, γ = 90 |
| Cell volume | 487.215 ų, Z = 4 |
| Axial ratios | 2.9486:1:2.9273calculated from COD 9007373 |
| Source structure | COD 9007373 (Physics and Chemistry of Minerals, 2005) — 1 of 24 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.763 | 3.05 | 3.553 | 3.574 | 5.051 | 1.942 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 91.6 | 63 | 61.6 | 54.3 | 45.3 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9007373; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 4.631 g/cm³calculated from COD 9007373 |
|---|---|
| Hardness (Mohs) | 8single sourceWikidata (CC0) 2single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 2.16 g/cm3single sourceDana's System, 3rd Appendix (1915) |
| Color | black, graysingle 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 | 339.72 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Sb 71.68%, S 28.32% |
Classification
| Nickel-Strunz (10th) | 2.DB.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.DB.05aWikidata (CC0) |
| Dana (8th) | 2.11.2.1Wikidata (CC0) |