Berthierite
FeSb2S4IMA symbol: Btrgrandfathered
Berthierite is a sulfide or sulfosalt mineral with the formula FeSb2S4, crystallizing in the orthorhombic system. It has a Mohs hardness of 2-3, typically brown, gray or red in color, with a metallic luster, a specific gravity of 4-4.3. Cleavage is indistinct.
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P n a m |
| Cell (Å, °) | a = 11.2796, b = 13.9181, c = 3.7359; α = 90, β = 90, γ = 90 |
| Cell volume | 586.501 ų, Z = 4 |
| Axial ratios | 0.8104:1:0.2684calculated from COD 9014693 |
| Source structure | COD 9014693 (The Canadian Mineralogist, 2012) — 1 of 12 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.16 | 2.603 | 2.586 | 3.63 | 2.843 | 3.583 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 95.4 | 93.4 | 93.3 | 83.1 | 57.8 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9014693; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 4.843 g/cm³calculated from COD 9014693 |
|---|---|
| Hardness (Mohs) | 2-3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 4-4.3 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | brown, gray, redsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | metallicDana, System of Mineralogy, 6th ed. (1892) |
| Cleavage | indistinctDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 427.62 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Fe 13.06%, Sb 56.95%, S 29.99% |
Classification
| Nickel-Strunz (10th) | 2.HA.20Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.HA.20Wikidata (CC0) |