Silver subfluoride

Silver subfluoride

Names
IUPAC name silver(0,I) fluoride
Identifiers
CAS Number	1302-01-8 Y
3D model (JSmol)	Interactive image
PubChem CID	154085723
InChI InChI=1S/2Ag.FH/h;;1H/q;+1;/p-1 Key: NYHLXUAEPHSVOU-UHFFFAOYSA-M
SMILES F[Ag].[Ag]
Properties
Chemical 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 (194 °F; 363 K) decomposition
Solubility in water	reacts
Related compounds
Related compounds	Silver(I) fluoride Silver(II) fluoride Silver(III) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) 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 compound is produced by the reaction of silver and silver(I) 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 "Ag^½+" 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