Alabandite
MnSIMA symbol: Abdgrandfathered
Alabandite is a sulfide or sulfosalt mineral with the formula MnS. It has a Mohs hardness of 3.5-4, typically black or brown in color, with a metallic or submetallic luster, a specific gravity of 3.95-4.04. Its streak is green; cleavage is perfect.
Photos
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Crystallography
| Space group | F m -3 m |
|---|---|
| Cell (Å, °) | a = 5.2245, b = 5.2245, c = 5.2245; α = 90, β = 90, γ = 90 |
| Cell volume | 142.605 ų, Z = 4 |
| Axial ratios | 1.0000:1:1.0000calculated from COD 9005930 |
| Source structure | COD 9005930 (Physics and Chemistry of Minerals, 1991) — 1 of 18 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.612 | 1.847 | 1.168 | 1.508 | 3.016 | 1.306 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 65 | 26.3 | 21.1 | 12.9 | 9.5 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9005930; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 4.052 g/cm³calculated from COD 9005930 |
|---|---|
| Hardness (Mohs) | 3.5-4Dana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 3.95-4.04 g/cm3Dana, System of Mineralogy, 6th ed. (1892) |
| Color | black, brownsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | greensingle sourceWikidata (CC0) greensingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | metallic, submetallicsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Cleavage | perfectsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 87.0 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Mn 63.14%, S 36.86% |
Classification
| Nickel-Strunz (10th) | 2.CD.10Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.CD.10Wikidata (CC0) |