Thallium (I) iodide

Crystal structure
	__ Tl + __ I -
Crystal system	orthorhombic
Space group	Cmcm (No. 63)
Lattice parameters	a = 458.2 pm, b = 1292 pm, c = 525.1 pm
General
Surname	Thallium (I) iodide
other names	Thallium iodide; Thallium monoiodide;
Ratio formula	TlI
Brief description	yellow solid
External identifiers / databases
EC number	232-199-7
ECHA InfoCard	100.029.272
PubChem	62679
Wikidata	Q425255
properties
Molar mass	331.29 g mol −1
Physical state	firmly
density	7.29 g cm −3
Melting point	440 ° C
boiling point	824 ° C
solubility	practically insoluble in water
safety instructions
H and P phrases	H: 300-330-373-411
	P: 260-264-273-284-301 + 310-310
Thermodynamic properties
ΔH f 0	−124 kJ mol −1
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Thallium (I) iodide is a chemical compound from the group of thallium compounds and iodides .

Extraction and presentation

Thallium (I) iodide can be obtained by reacting thallium (I) sulfate or thallium (I) nitrate with potassium iodide .

{\ displaystyle {\ ce {Tl2SO4 + 2KI -> 2TlI v + K2SO4}}}

properties

Thallium (I) iodide occurs in two enantiotropic modifications. Below 168 ° C it has an orthorhombic crystal structure with the space group Cmcm (space group no. 63) (a = 458.2, b = 1292, c = 525.1 pm). It changes color when exposed to light. At temperatures above 168 ° C it is present as a red solid with a crystal structure of the cesium chloride type. This structure remains unchanged for some time even after cooling to room temperature. Template: room group / 63

use

Thallium (I) iodide is used as a mixed crystal together with thallium (I) bromide as thallium bromide iodide in the attenuated total reflection spectroscopy .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 876.
↑ ^a ^b Data sheet Thallium (I) iodide from Sigma-Aldrich , accessed on April 24, 2011 ( PDF ).
↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry thallium compounds, with the exception of those specified elsewhere in this Annex in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA ), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
^ AF Holleman , N. Wiberg : Inorganische Chemie . 103rd edition. Volume 1: Basics and main group elements. Walter de Gruyter, Berlin / Boston 2016, ISBN 978-3-11-049585-0 , p. 1393 (reading sample: Part A - Basics of the chemistry of hydrogen. Google book search ).
↑ J Michael Hollas: Modern methods in spectroscopy ; ISBN 978-3-540-67008-7 , p. 59.

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f ^g Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 876.

[Sigma-2] Data sheet Thallium (I) iodide from Sigma-Aldrich , accessed on April 24, 2011 ( PDF ).

[CLP_100.240.787-3] Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry thallium compounds, with the exception of those specified elsewhere in this Annex in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA ), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .

[4] AF Holleman , N. Wiberg : Inorganische Chemie . 103rd edition. Volume 1: Basics and main group elements. Walter de Gruyter, Berlin / Boston 2016, ISBN 978-3-11-049585-0 , p. 1393 (reading sample: Part A - Basics of the chemistry of hydrogen. Google book search ).

[5] J Michael Hollas: Modern methods in spectroscopy ; ISBN 978-3-540-67008-7 , p. 59.