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THALLIUM (I) OXIDE

Reaction

THALLIUM (I) OXIDE

THALLIUM (I) OXIDE Property

Melting point about 300°
Boiling point 1080℃ [HAW93]
Density 9.520
solubility soluble in H2O, ethanol
form black rhombohedral crystals
color black rhomb crystals, crystalline; hygroscopic
Water Solubility soluble H2O, hydrolyzes to hydroxide; soluble alcohol [MER06]
Crystal Structure Reverse CdCl2 type
crystal system Three sides
Space group R3m
Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3
0.3516 0.3516 3.784 90 90 120 0.4051
CAS DataBase Reference 1314-12-1
FDA UNII LHV2O5DWPQ
EPA Substance Registry System Thallium oxide (Tl2O) (1314-12-1)

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.3516	0.3516	3.784	90	90	120	0.4051

Safety

Hazard and Precautionary Statements (GHS)

THALLIUM (I) OXIDE Chemical Properties,Usage,Production

Reaction Thallium oxide slowly oxidizes to thallic oxide, Tl2O3 on exposure to air, gradually becoming insoluble in aqueous solution.
Physical properties Thallium monooxide is a black powder; orthorhombic crystals; hygroscopic; density 9.52g/cm3; melts at 596°C; vaporizes at about 1,080°C; soluble in water, alcohol and acids.
Uses In manufacture of glass of a high coefficient of refraction for optical purposes (thallium flint glass) and for artificial gems.
Preparation Thallium oxide can be made by heating Tl metal in air or oxygen. The brown-black thallic oxide, Tl₂O₃ , that may also form begins to lose oxygen at about 100°C converting to thallium oxide, Tl₂O.
Thallium oxide also can be prepared by thermal dissociation of thallium hydroxide, TlOH or thallium carbonate, Tl₂CO₃ Thallium oxide dissolves in water forming thallous hydroxide, TlOH. It reacts with carbon dioxide to form thallous carbonate, Tl2CO3.
Hazard Toxic by ingestion.

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THALLIUM (I) OXIDE Spectrum

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