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Silver iodide
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| Names | |
|---|---|
| IUPAC name
Silver(I) iodide
| |
| Other names
Argentous iodide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.029.125 |
| EC Number |
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PubChem CID
|
|
| UNII | |
CompTox Dashboard (EPA)
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|
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| Properties | |
| AgI | |
| Molar mass | 234.77 g/mol |
| Appearance | yellow, crystalline solid |
| Odor | odorless |
| Density | 5.68 g/cm3, solid[1] |
| Melting point | 558 °C (1,036 °F; 831 K)[1] |
| Boiling point | 1,506 °C (2,743 °F; 1,779 K)[1] |
| 0.03 mg/L (20 °C)[1] | |
Solubility product (Ksp)
|
8.52 × 10 −17[2] |
| Solubility | very soluble in liquid ammonia |
| −80.0·10−6 cm3/mol[3] | |
| Structure[5] | |
| Hexagonal, hP4 | |
| P63mc, No. 186 | |
a = 0.4591 nm, c = 0.7508 nm α = 90°, β = 90°, γ = 120°
| |
Formula units (Z)
|
2 |
| 4.55 D[4] | |
| Thermochemistry[6] | |
Heat capacity (C)
|
56.8 J·mol−1·K−1 |
Std molar
entropy (S⦵298) |
115.5 J·mol−1·K−1 |
Std enthalpy of
formation (ΔfH⦵298) |
−61.8 kJ·mol−1 |
Gibbs free energy (ΔfG⦵)
|
−66.2 kJ·mol−1 |
| Hazards | |
| GHS labelling:[7] | |
| |
| Warning | |
| H410 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Safety data sheet (SDS) | Sigma-Aldrich |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Silver iodide is an inorganic compound with the formula AgI. The compound is a bright yellow solid, but samples almost always contain impurities of metallic silver that give a grey colouration. The silver contamination arises because some samples of AgI can be highly photosensitive. This property is exploited in silver-based photography. Silver iodide is also used as an antiseptic and in cloud seeding.
- ^ a b c d Haynes, p. 4.84
- ^ Haynes, p. 5.178
- ^ Haynes, p. 4.130
- ^ Haynes, p. 9.65
- ^ Yoshiasa, A.; Koto, K.; Kanamaru, F.; Emura, S.; Horiuchi, H. (1987). "Anharmonic thermal vibrations in wurtzite-type AgI". Acta Crystallographica Section B: Structural Science. 43 (5): 434–440. Bibcode:1987AcCrB..43..434Y. doi:10.1107/S0108768187097532.
- ^ Haynes, p. 5.35
- ^ "C&L Inventory". echa.europa.eu. Retrieved 15 December 2021.
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