Copper(II) fluoride

Copper(II) fluoride
Ball-and-stick model of the unit cell of copper(II) fluoride
Unit cell of the anhydrous form
Ball-and-stick model of packing in the crystal structure of copper(II) fluoride
Ball-and-stick model of crystal packing in the anhydrous form
Actual picture
Dihydrate
Names
IUPAC name
Copper difluoride
Other names
Cupric fluoride; Copper fluoride; Copper (2+) Difluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.225 Edit this at Wikidata
EC Number
  • 232-147-3
UNII
  • InChI=1S/Cu.2FH/h;2*1H/q+2;;/p-2 checkY
    Key: GWFAVIIMQDUCRA-UHFFFAOYSA-L checkY
  • InChI=1/Cu.2FH/h;2*1H/q+2;;/p-2
    Key: GWFAVIIMQDUCRA-NUQVWONBAF
  • [Cu+2].[F-].[F-]
Properties
CuF2
Molar mass 101.543 g/mol (anhydrous)
137.573 g/mol (dihydrate)
Appearance White crystalline powder
When hydrated: Blue
Density 4.23 g/cm3 (anhydrous)
2.934 g/cm3 (dihydrate)[1]
Melting point 836 °C (1,537 °F; 1,109 K) (anhydrous)
130 °C (dihydrate, decomposes)
Boiling point 1,676 °C (3,049 °F; 1,949 K) (anhydrous)
+1050.0·10−6 cm3/mol
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1 mg/m3 (as Cu)[2]
REL (Recommended)
 TWA 1 mg/m3 (as Cu)[2]
IDLH (Immediate danger)
 TWA 100 mg/m3 (as Cu)[2]
Related compounds
Other anions
 Copper(II) bromide
Copper(II) chloride
Other cations
 Silver(II) fluoride
Cobalt(II) fluoride
Related compounds
 Copper(I) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Copper(II) fluoride is an inorganic compound with the chemical formula CuF2. The anhydrous form is a white, ionic, crystalline, hygroscopic salt with a distorted rutile-type crystal structure, similar to other fluorides of chemical formulae MF2 (where M is a metal). The dihydrate, CuF2·2H2O, is blue in colour.[3]

  1. ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
  2. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 1184–1185. ISBN 978-0-08-037941-8.