Facts
- Symbol
- Tl
- Atomic number
- 81
- Atomic mass
- 204.4 u
- Minerals
- 80
- Period
- 6
- Group
- 13
- Block
- p
- Melting point
- 577 °C
- Boiling point
- 1,733 °C
- Discovered
- 1861
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q932
Minerals containing this element · 80
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Arsiccioite | AgHg₂TlAs₂S₆ | Tetragonal | — | — |
| Avicennite | Tl₂O₃ | Cubic | — | — |
| Bernardite | TlAs₅S₈ | Monoclinic | — | — |
| Boscardinite | TlPb₄(Sb₇As₂)S₁₈ | Triclinic | — | — |
| Bukovite | Cu₄Tl₂Se₄ | Tetragonal | — | — |
| Buynite | TlPb₁₄As₁₇S₄₀ | Monoclinic | — | — |
| Carlinite | Tl₂S | Trigonal | 1.0 | — |
| Chabournéite | Tl₄Pb₂(Sb,As)₂₀S₃₄ | Triclinic | — | — |
| Chalcothallite | Tl₂(Cu,Fe)₆SbS₄ | Tetragonal | — | — |
| Christite | TlHgAsS₃ | Monoclinic | — | — |
| Chrysothallite | K₆Cu₆Tl³⁺Cl₁₇(OH)₄·H₂O | Tetragonal | — | — |
| Crookesite | Cu₇TlSe₄ | Tetragonal | — | — |
| Cuprostibite | Cu₂(Sb,Tl) | Tetragonal | — | — |
| Dalnegroite | Tl₄Pb₂(As,Sb)₂₀S₃₄ | Triclinic | — | — |
| Dekatriasartorite | TlPb₅₈As₉₇S₂₀₄ | Monoclinic | — | — |
| Dorallcharite | TlFe³⁺₃(SO₄)₂(OH)₆ | Trigonal | — | — |
| Edenharterite | PbTlAs₃S₆ | Orthorhombic | — | — |
| Ellisite | Tl₃AsS₃ | Trigonal | — | 6.61 g/cm³ |
| Enneasartorite | Tl₆Pb₃₂As₇₀S₁₄₀ | Monoclinic | — | — |
| Erniggliite | Tl₂SnAs₂S₆ | Trigonal | — | 4.86 g/cm³ |
| Evdokimovite | Tl₄(VO)₃(SO₄)₅(H₂O)₅ | Monoclinic | — | — |
| Fangite | Tl₃AsS₄ | Orthorhombic | — | 5.92 g/cm³ |
| Ferrostalderite | CuFe₂TlAs₂S₆ | Tetragonal | — | — |
| Ferrovorontsovite | (Fe₅Cu)∑₆TlAs₄S₁₂ | Cubic | — | — |
| Gabrielite | Tl₂AgCu₂As₃S₇ | Triclinic | — | — |
| Geuerite | Ag₂Tl₄Pb₄As₂₂S₄₀ | Monoclinic | — | — |
| Gillulyite | Tl₂As₇.₅Sb₀.₃S₁₃ | — | — | — |
| Ginelfite | Ag₂(Ag₀.₅Fe²⁺₀.₅)TlPb₂₃.₅(Sb,As)₃₃.₅S₇₆ | — | — | — |
| Giuşcăite | Ag₂Tl₄Pb₄As₂₀Sb₂S₄₀ | Monoclinic | — | — |
| Gladkovskyite | MnTlAs₃S₆ | Trigonal | — | — |
| Gungerite | TlAs₅Sb₄S₁₃ | Orthorhombic | — | — |
| Hatchite | AgPbTlAs₂S₅ | Triclinic | — | — |
| Hendekasartorite | Tl₂Pb₄₈As₈₂S₁₇₂ | Monoclinic | — | — |
| Hephaistosite | TlPb₂Cl₅ | Monoclinic | — | — |
| Heptasartorite | Tl₇Pb₂₂As₅₅S₁₀₈ | Monoclinic | — | — |
| Honeaite | Au₃TlTe₂ | Orthorhombic | — | — |
| Hutchinsonite | TlPbAs₅S₉ | Orthorhombic | — | — |
| Imhofite | Tl₅.₈As₁₅.₄S₂₆ | — | — | — |
| Incomsartorite | Tl₆Pb₁₄₄As₂₄₆S₅₁₆ | Monoclinic | — | — |
| Jentschite | TlPbAs₂SbS₆ | Monoclinic | — | — |
| Kalithallite | K₃Tl³⁺Cl₆*₂H₂O | Tetragonal | — | — |
| Karpovite | Tl₂VO(SO₄)₂(H₂O) | Monoclinic | — | — |
| Lafossaite | Tl(Cl,Br) | Cubic | — | — |
| Lanmuchangite | Tl+Al(SO₄)₂ * 12H₂O | — | — | — |
| Lorándite | TlAsS₂ | Monoclinic | — | 5.26 g/cm³ |
| Markhininite | TlBi(SO₄)₂ | Triclinic | — | — |
| Markwelchite | TlPbSbS₃ | Monoclinic | — | — |
| Nataliyamalikite | TlI | Orthorhombic | — | 6.30 g/cm³ |
| Parapierrotite | TlSb₅S₈ | Monoclinic | — | — |
| Philrothite | TlAs₃S₅ | Monoclinic | — | — |
| Picotpaulite | TlFe₂S₃ | Orthorhombic | 2.0 | 5.20 g/cm³ |
| Pierrotite | Tl₂(Sb,As)₁₀S₁₆ | — | — | — |
| Protochabournéite | Tl₂Pb(Sb,As)₁₀S₁₇ | Triclinic | — | — |
| Raberite | Tl₅Ag₄As₆SbS₁₅ | Triclinic | — | — |
| Raguinite | TlFeS₂ | Orthorhombic | — | — |
| Ralphcannonite | AgZn₂TlAs₂S₆ | Tetragonal | — | — |
| Rathite | Ag₂Pb₁₂₋ₓTlₓ/₂As₁₈₊ₓ/₂S₄₀ | — | 3.0 | — |
| Rayite | (Ag,Tl)₂Pb₈Sb₈S₂₁ | — | — | 6.13 g/cm³ |
| Rebulite | Tl₅Sb₅As₈S₂₂ | — | — | — |
| Richardsollyite | TlPbAsS₃ | Monoclinic | — | — |
Minerals named after it · 6
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Chalcothallite | Tl₂(Cu,Fe)₆SbS₄ | Tetragonal | — | — |
| Chrysothallite | K₆Cu₆Tl³⁺Cl₁₇(OH)₄·H₂O | Tetragonal | — | — |
| Thalcusite | Tl₂Cu₃FeS₄ | Tetragonal | — | — |
| Thalfenisite | Tl₆(Fe,Ni,Cu)₂₅S₂₆Cl | Cubic | — | — |
| Thalliomelane | — | Tetragonal | — | — |
| Thalliumpharmacosiderite | TlFe₄[(AsO₄)₃(OH)₄]·4H₂O | Cubic | — | — |