Teallite
PbSnS2IMA symbol: Telgrandfathered
Teallite is a sulfide or sulfosalt mineral with the formula PbSnS2, crystallizing in the orthorhombic system. It has a Mohs hardness of 1-2, typically black or gray in color, with a metallic luster, a specific gravity of 6.4. Its streak is black; cleavage is distinct.
Photos
Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P n m a |
| Cell (Å, °) | a = 11.4085, b = 4.086, c = 4.2813; α = 90, β = 90, γ = 90 |
| Cell volume | 199.573 ų, Z = 4 |
| Axial ratios | 2.7921:1:1.0478calculated from COD 9009263 |
| Source structure | COD 9009263 (Neues Jahrbuch fur Mineralogie, Abhandlungen, 2002) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.861 | 3.322 | 2.852 | 3.424 | 2.334 | 2.956 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 80 | 66 | 51.5 | 48.1 | 47.4 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9009263; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 6.276 g/cm³calculated from COD 9009263 |
|---|---|
| Hardness (Mohs) | 1-2single sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Specific gravity | 6.4 g/cm3corroboratedFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Color | black, graysingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Streak | blacksingle sourceWikidata (CC0) blacksingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Luster | metallicsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Cleavage | distinctsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
Chemistry (calculated)
| Molecular weight | 390.04 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Pb 53.12%, Sn 30.44%, S 16.44% |
Classification
| Nickel-Strunz (10th) | 2.CD.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 2.CD.05Wikidata (CC0) |