Hutchinsonite
TlPbAs5S9IMA symbol: Hutgrandfathered
Hutchinsonite is a sulfide or sulfosalt mineral with the formula TlPbAs5S9. It has a Mohs hardness of 1.5-2, typically red in color, with an adamantine luster, a specific gravity of 4.6. Its streak is red; cleavage is distinct.
Photos
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Crystallography
| Space group | P b c a |
|---|---|
| Cell (Å, °) | a = 10.786, b = 35.389, c = 8.141; α = 90, β = 90, γ = 90 |
| Cell volume | 3107.47 ų, Z = 8 |
| Axial ratios | 0.3048:1:0.2300calculated from COD 9011505 |
| Source structure | COD 9011505 (Zeitschrift fur Kristallographie, 1994) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.042 | 3.688 | 2.736 | 2.696 | 2.378 | 4.367 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 63.5 | 63.4 | 46.4 | 40.2 | 39.6 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9011505; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 4.638 g/cm³calculated from COD 9011505 |
|---|---|
| Hardness (Mohs) | 1.5-2single sourceDana's System, 2nd Appendix (1909) |
| Specific gravity | 4.6 g/cm3Dana's System, 2nd Appendix (1909) |
| Color | redsingle sourceDana's System, 2nd Appendix (1909) |
| Streak | redsingle sourceWikidata (CC0) redsingle sourceDana's System, 2nd Appendix (1909) |
| Luster | adamantineDana's System, 2nd Appendix (1909) |
| Cleavage | distinctDana's System, 2nd Appendix (1909) |
Chemistry (calculated)
| Molecular weight | 1074.78 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Tl 19.02%, Pb 19.28%, As 34.85%, S 26.85% |
Classification
| Nickel-Strunz (10th) | 2.HD.45Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.HD.45Wikidata (CC0) |