Thallium (I) fluoride

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Crystal structure
Crystal structure of thallium (I) fluoride
__ Tl +      __ F -
Crystal system

orthorhombic

General
Surname Thallium (I) fluoride
other names
  • Thallium fluoride (ambiguous)
  • Thallium monofluoride
Ratio formula TlF
Brief description

colorless solid

External identifiers / databases
CAS number 7789-27-7
EC number 232-154-1
ECHA InfoCard 100.029.231
PubChem 62675
Wikidata Q419385
properties
Molar mass 223.39 g mol −1
Physical state

firmly

density

8.36 g cm −3

Melting point

327 ° C

boiling point

655 ° C

solubility
  • very soluble in water
  • slightly soluble in ethanol
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
06 - Toxic or very toxic 08 - Dangerous to health 09 - Dangerous for the environment

danger

H and P phrases H: 300-330-373-411
P: 260-264-273-284-301 + 310-310
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

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

Extraction and presentation

Thallium (I) fluoride can be obtained by reacting thallium (I) carbonate with pure hydrogen fluoride .

properties

Thallium (I) fluoride is in the form of hard, shiny white crystals with an orthorhombic crystal structure (deformed rock salt structure , a = 518.48, b = 609.80, c = 549.16 (2) pm, Z = 4, space group Pm 2 a (room group no. 28, position 6) ). As a liquid it is yellowish. It is not hygroscopic , but dissolves when you breathe on it and immediately solidifies again. The concentrated aqueous solution shows strong alkaline reactions . Template: room group / 28.6

use

Thallium (I) fluoride can be used to make fluorine-containing esters .

See also

Individual evidence

  1. ↑ a b c d e f g h i 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.
  2. ↑ a b Data sheet Thallium (I) fluoride from Sigma-Aldrich , accessed on April 24, 2011 ( PDF ).
  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. ↑ Crystal structure and lattice energy of thallium (I) fluoride: inert-pair distortions , doi : 10.1039 / DT9740001907 .