Silver bromide
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| Other names | |||
| Identifiers | |||
3D model (JSmol) |
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| ChemSpider | |||
| ECHA InfoCard | 100.029.160 | ||
| UNII | |||
CompTox Dashboard (EPA) |
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| Properties | |||
| AgBr | |||
| Molar mass | 187.77 g/mol | ||
| Appearance | Pale yellow solid photosensitive | ||
| Density | 6.473 g/cm3, solid | ||
| Melting point | 432 °C (810 °F; 705 K) | ||
| Boiling point | 1,502 °C (2,736 °F; 1,775 K) (decomposes) | ||
| 0.140 mg/L (20 °C) | |||
Solubility product (Ksp) |
5.4 × 10 −13 | ||
| Solubility | insoluble in alcohol, most acids sparingly soluble in ammonia soluble in alkali cyanide solutions | ||
| Band gap | 2.5 eV | ||
| Electron mobility | 4000 cm2/(V·s) | ||
| −59.7·10−6 cm3/mol | |||
Refractive index (nD) |
2.253 | ||
| Thermochemistry | |||
Heat capacity (C) |
270 J/(kg·K) | ||
Std molar entropy (S⦵298) |
107 J·mol−1·K−1 | ||
Std enthalpy of formation (ΔfH⦵298) |
−100 kJ·mol−1 | ||
| Hazards | |||
| NFPA 704 (fire diamond) | |||
| Related compounds | |||
Other anions |
Silver(I) fluoride Silver chloride Silver iodide | ||
Other cations |
Copper(I) bromide Mercury(I) bromide | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |||
Silver bromide (AgBr), a soft, pale-yellow, water-insoluble salt well known (along with other silver halides) for its unusual sensitivity to light. This property has allowed silver halides to become the basis of modern photographic materials. AgBr is widely used in photographic films and is believed by some to have been used for faking the Shroud of Turin. The salt can be found naturally as the mineral bromargyrite (bromyrite).