Thallium(III) oxide

Thallium(III) oxide
Names
	Other names thallium trioxide, thallium sesquioxide
Identifiers
CAS Number	1314-32-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	7979876 ;
ECHA InfoCard	100.013.846
EC Number	215-229-3;
PubChem CID	9804116;
UNII	8C7MZ48UJ1 ;
CompTox Dashboard (EPA)	DTXSID1024330 ;
	InChI InChI=1S/3O.2Tl/q3-2;2+3 Key: LPHBARMWKLYWRA-UHFFFAOYSA-N ;
	SMILES [O-2].[O-2].[O-2].[Tl+3].[Tl+3];
Properties
Chemical formula	Tl2O3
Molar mass	456.76 g/mol
Appearance	dark brown solid
Density	10.19 g/cm3, solid (22 °C)
Melting point	717 °C (1,323 °F; 990 K)
Boiling point	875 °C (1,607 °F; 1,148 K) (decomposes)
Solubility in water	insoluble
Magnetic susceptibility (χ)	+76.0·10−6 cm3/mol
Structure
Crystal structure	Cubic, (Bixbyite) cI80
Space group	Ia3 (No. 206)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300+H330, H373, H411
Precautionary statements	P273, P301+P310+P330, P304+P340+P310, P314
NFPA 704 (fire diamond)	4 0 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	44 mg/kg (oral, rat)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Thallium(III) oxide, also known as thallic oxide, is a chemical compound of thallium and oxygen. It occurs in nature as the rare mineral avicennite.^[4] Its structure is related to that of Mn₂O₃ which has a bixbyite like structure. Tl₂O₃ is metallic with high conductivity and is a degenerate n-type semiconductor which may have potential use in solar cells.^[5] A method of producing Tl₂O₃ by MOCVD is known.^[6] Any practical use of thallium(III) oxide will always have to take account of thallium's poisonous nature. Contact with moisture and acids may form poisonous thallium compounds.

^ Weast, Robert C., ed. (1981). CRC Handbook of Chemistry and Physics (62nd ed.). Boca Raton, FL: CRC Press. p. B156. ISBN 0-8493-0462-8..
^ Otto H.H.; Baltrasch R.; Brandt H.J. (1993). "Further evidence for Tl3+ in Tl-based superconductors from improved bond strength parameters involving new structural data of cubic Tl2O3". Physica C. 215 (1–2): 205. doi:10.1016/0921-4534(93)90382-Z.
^ GHS: Sigma-Aldrich 204617
^ http://www.handbookofmineralogy.org/pdfs/avicennite.pdf Handbook of Mineralogy
^ Phillips R. J.; Shane M. J.; Switzer J. A. (1989). "Electrochemical and photoelectrochemical deposition of Thallium(III) Oxide thin films". Journal of Materials Research. 4 (4): 923. Bibcode:1989JMatR...4..923P. doi:10.1557/JMR.1989.0923. S2CID 96808351.
^ D. Berry; R. T. Holm; R. L. Mowery; N. H. Turner & M. Fatemi (1991). "Thallium(III) Oxide by Organometallic Chemical Vapor Deposition". Chemistry of Materials. 3 (1): 72–77. doi:10.1021/cm00013a019.

[1] Weast, Robert C., ed. (1981). CRC Handbook of Chemistry and Physics (62nd ed.). Boca Raton, FL: CRC Press. p. B156. ISBN 0-8493-0462-8..

[struct-2] Otto H.H.; Baltrasch R.; Brandt H.J. (1993). "Further evidence for Tl3+ in Tl-based superconductors from improved bond strength parameters involving new structural data of cubic Tl2O3". Physica C. 215 (1–2): 205. doi:10.1016/0921-4534(93)90382-Z.

[3] GHS: Sigma-Aldrich 204617

[4] ttp://www.handbookofmineralogy.org/pdfs/avicennite.pdf Handbook of Mineralogy

[5] Phillips R. J.; Shane M. J.; Switzer J. A. (1989). "Electrochemical and photoelectrochemical deposition of Thallium(III) Oxide thin films". Journal of Materials Research. 4 (4): 923. Bibcode:1989JMatR...4..923P. doi:10.1557/JMR.1989.0923. S2CID 96808351.

[6] D. Berry; R. T. Holm; R. L. Mowery; N. H. Turner & M. Fatemi (1991). "Thallium(III) Oxide by Organometallic Chemical Vapor Deposition". Chemistry of Materials. 3 (1): 72–77. doi:10.1021/cm00013a019.

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