Thallium (I) oxide

Crystal structure
__ Tl +      __ O 2−
General
Surname	Thallium (I) oxide
other names	Dithallium monoxide
Ratio formula	Tl 2 O
Brief description	black solid
External identifiers / databases
CAS number 1314-12-1 EC number 215-220-4 ECHA InfoCard 100,013,838 PubChem 16684203 Wikidata Q2983581
properties
Molar mass	424.77 g mol −1
Physical state	firmly
density	9.52 g cm −3
Melting point	579 ° C
boiling point	1080 ° C
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 330-300-373-411 P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Thallium (I) oxide is an inorganic chemical compound of thallium from the group of oxides .

Extraction and presentation

Thallium (I) oxide can be prepared by heating thallium (I) hydroxide to over 100 ° C or thallium (III) oxide to over 700 ° C in the absence of air.

${\displaystyle \mathrm {2\ TlOH\longrightarrow Tl_{2}O+H_{2}O} }$

properties

Thallium (I) oxide is a very hygroscopic black solid that is easily soluble in water with the formation of thallium (I) hydroxide. It has a crystal structure that is to be understood as a triple polytype form of the anti- cadmium (II) iodide type. It is a trigonal crystal structure with the space group R 3 m (space group no. 166) .

Individual evidence

1. ↑ ^{a b c d e f} Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . Springer DE, 1997, ISBN 3-540-60035-3 , pp. 776 ( limited preview in Google Book search).
2. ↑ David R. Lide: CRC Handbook of Chemistry and Physics . CRC Press, 2012, ISBN 1-4398-8049-2 , pp. 4–94 ( limited preview in Google Book Search).
3. ↑ Entry on thallium compounds, inorganic, soluble in the GESTIS substance database of the IFA , accessed on November 26, 2013(JavaScript required) .
4. ↑ Simon Aldridge, Anthony J. Downs: The Group 13 Metals Aluminum, Gallium, Indium and Thallium: Chemical ... John Wiley & Sons, 2011, ISBN 0-470-97668-3 , pp. 325 ( limited preview in Google Book Search).
5. ↑ H. Sabrowsky: To represent and crystal structure of Tl ₂ O . In: Journal for inorganic and general chemistry , 381 (3), 1971, pp. 266-279. doi : 10.1002 / zaac.19713810305