Silver subfluoride

Silver subfluoride
Silver subfluoride
Identifiers
CAS number 1302-01-8
Properties
Molecular formula Ag2F
Molar mass 234.734 g/mol
Appearance Bronze-colored crystals with green luster
Density 8.6 g/cm3, solid
Melting point

90 °C. decomposition

 YesY subfluoride (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Silver subfluoride is the inorganic compound with the formula Ag2F. This is an unusual example of a compound where the oxidation state of silver is fractional. The is prepared by the reaction of silver and silver fluoride:[1]

Ag + AgF → Ag2F

It forms small crystals with a bronze reflex and is a good conductor of electricity. On contact with water almost instant hydrolysis occurs with the precipitation of silver (Ag) powder.

Crystal structure

Ag2F adopts the anti-CdI2 crystal structure, i.e. the same structure as cadmium iodide, CdI2, but with "Ag½+ " centres in the I positions and F in the Cd2+ positions.[2] The shortest distance between silver atoms is 299.6 pm (compared to 289 pm in the metal).[3]

References

  1. ^ Lee Poyer, Maurice Fielder, Hugh Harrison, Burl E. Bryant "Disilver Fluoride: (Silver “Subfluoride”)" Inorganic Syntheses, 1957, Volume 5, 92–94. doi:10.1002/9780470132364.ch6
  2. ^ A Williams (April 1989). "Neutron powder diffraction study of silver subfluoride". J. Phys.: Condens. Matter 1 (15): 2569–2574. doi:10.1088/0953-8984/1/15/002. 
  3. ^ Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5

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Look at other dictionaries:

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  • subfluoride — “+ noun Etymology: sub + fluoride : a fluoride containing a relatively small proportion of fluorine silver subfluoride Ag2F …   Useful english dictionary

  • Dictionary of chemical formulas — This is a list of chemical compounds with chemical formulas and CAS numbers, indexed by formula. This complements alternative listings to be found at list of inorganic compounds, list of organic compounds and inorganic compounds by element. Table …   Wikipedia

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