Thallium(I) sulfide

Thallium(I) sulfide, also known as thallous sulfide, is a chemical compound. Its chemical formula is Tl₂S. It has thallium and sulfide ions in it. The thallium is in its +1 oxidation state.

Thallium(I) sulfide

Names
IUPAC name Thallium(I) sulfide
Other names thallous sulfide, thallous sulphide
Identifiers
CAS Number	1314-97-2 N
3D model (JSmol)	Interactive image
ChemSpider	140161 Y
ECHA InfoCard	100.013.865
EC Number	215-250-8
PubChem CID	16683485
CompTox Dashboard (EPA)	DTXSID801027166
SMILES S([Tl])[Tl]
Properties
Chemical formula	Tl2S
Molar mass	440.833 g/mol
Appearance	black crystalline solid
Density	8.390 g/cm3
Melting point	448 °C (838 °F; 721 K)
Boiling point	1,367 °C (2,493 °F; 1,640 K)
Magnetic susceptibility (χ)	−88.8·10−6 cm3/mol
Structure
Crystal structure	Trigonal, hR81
Space group	R3, No. 146
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Properties

Thallium(I) sulfide is a black solid. It reacts with acids to make hydrogen sulfide and a thallium salt.

Occurrence and preparation

It is found as a mineral called carlinite, but it is rare. It is the only thallium sulfide mineral that does not have another metal in it. It is made in the laboratory by reacting thallium(I) sulfate with hydrogen sulfide or by heating thallium and sulfur together.

Uses

It was used in some of the first infrared detectors. One of the first reliable infrared detectors used thallium sulfide and it was made in World War II.

Related pages

• Thallium(I) chloride
• Thallium(III) oxide
• Thallium(I) oxide