Silver subfluoride
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| Silver subfluoride | |
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| IUPAC name | silver(0,I) fluoride |
| 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 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Silver subfluoride (Ag2F) is a metal halide used in dental alloys. It is made by leaving metallic silver in contact with silver fluoride in the dark. It forms small crystals with a bronze reflex, and is a good conductor of electricity. On contact with water almost instant hydrolysis with precipitation of silver (Ag) powder.
[edit] Crystal structure
Ag2F adopts the anti-CdI2 crystal structure, i.e. the same structure as cadmium iodide, CdI2, but with "Ag½+ " in the I− positions and F− in the Cd2+ positions[1].
[edit] References
The Merck Index, 12th edition, Merck & Co., Inc, Whitehouse Station, NJ
- ^ A Williams (April 1989). "Neutron powder diffraction study of silver subfluoride". J. Phys.: Condens. Matter 1 (15): 2569-2574. doi:.
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