| Identification | Back Directory | [Name]
THALLIUM (I) OXIDE | [CAS]
1314-12-1 | [Synonyms]
Tl2-O
Thallous oxide
THALLIUM OXIDE
dithalliumoxide
Oxydithallium(I)
THALLIUM MONOXIDE
THALLIUM(+1)OXIDE
THALLIUM (I) OXIDE
Thallium monooxide
THALLIUM(OUS) OXIDE
thalliumoxide(tl2o)
Dithallium monoxide
Thallium oxide (Tl2O) | [EINECS(EC#)]
215-220-4 | [Molecular Formula]
OTl2 | [MDL Number]
MFCD00054157 | [MOL File]
1314-12-1.mol | [Molecular Weight]
424.77 |
| Chemical Properties | Back Directory | [Appearance]
Finely divided black solid. Soluble in water and alcohol. Oxidizes when
exposed to air. | [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 | [EPA Substance Registry System]
Thallium oxide (Tl2O) (1314-12-1) |
| Hazard Information | Back Directory | [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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