Thallium(I) oxide

Thallium(I) oxide
Names
	Other names Thallous oxide
Identifiers
CAS Number	1314-12-1;
ECHA InfoCard	100.013.838
EC Number	215-220-4;
CompTox Dashboard (EPA)	DTXSID40894900 ;
	InChI InChI=1/O.2Tl/q-2;2*+1;
Properties
Chemical formula	Tl2O
Molar mass	424.07 g/mol
Appearance	black orthorhombic crystals ; hygroscopic
Density	10.45 g/cm3
Melting point	596 °C
Boiling point	1080 °C (decomp)
Solubility in water	soluble
Solubility	soluble in alcohol and acid
Structure
Crystal structure	Rhombohedral, hR18
Space group	R-3m, No. 166
Related compounds
Other cations	Thallium(III) oxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Thallium(I) oxide is the inorganic compound of thallium and oxygen with the formula Tl₂O in which thallium is in its +1 oxidation state. It is black and produces a basic yellow solution of thallium(I) hydroxide (TlOH) when dissolved in water. It is formed by heating solid TlOH or Tl₂CO₃ in the absence of air. Thallium oxide is used to make special high refractive index glass. Thallium oxide is a component of several high temperature superconductors. Thallium(I) oxide reacts with acids to make thallium(I) salts.

Tl₂O adopts the anti-cadmium iodide motif in the solid state.^[1] In this way, the Tl(I) centers are pyrdamidal and the oxide centers are octahedral.

Thallium(I) oxide, like all thallium compounds, is highly toxic.

References

^ ^a ^b Sabrowsky H. (1971). "Zur Darstellung und Kristallstruktur von Tl₂O". Zeitschrift fur anorganische und allgemeine Chemie. 381: 266. doi:10.1002/zaac.19713810305.

External links

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[ZaaC-1] Sabrowsky H. (1971). "Zur Darstellung und Kristallstruktur von Tl₂O". Zeitschrift fur anorganische und allgemeine Chemie. 381: 266. doi:10.1002/zaac.19713810305.

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