|__ Ag + __ Br -|
Fm 3 m (No. 225)
Ag , Br 
white to yellowish green solid
|External identifiers / databases|
|Molar mass||187.77 g mol −1|
6.47 g cm −3
430 ° C
1502 ° C
almost insoluble in water, 0.14 mg l −1 (25 ° C)
|ΔH f 0||
−100.4 kJ / mol
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .|
Silver bromide occurs naturally in the form of the mineral bromogyrite .
Extraction and presentation
Silver bromide precipitates out as a yellowish-whitish precipitate when silver salt, usually silver nitrate, and a soluble bromine salt meet.
The compound can also be obtained by reacting silver with bromine under excess pressure at 500 ° C.
Dry freshly extracted silver bromide looks yellowish. Its melt is orange-red. It is very difficult in water, difficult in concentrated ammonia solution and easily soluble in thiosulphate and cyanide solution. It quickly turns dark in the light as a result of silver deposition through photolytic decomposition . Silver bromide has a cubic crystal structure of the sodium chloride type.
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The salt is stored in small crystal fragments in a gelatin layer (or similar substances). When light falls on this, the silver bromide decomposes into its elementary components - silver and bromine ; the bromine evaporates. The exposed crystals stand out from the background because the finely divided silver appears black.
- Entry on silver bromide. In: Römpp Online . Georg Thieme Verlag, accessed on November 12, 2014.
- David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Inorganic Compounds, pp. 4-88.
- David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-4.
- C. Doelter, H. Leitmeier: Haloid salts, fluorides, organic compounds (coal, asphalt, petroleum), supplements, general register (final volume) . Springer-Verlag, 2013, ISBN 978-3-642-49884-8 , pp. 72 ( limited preview in Google Book search).
- Egon Wiberg: Inorganic Chemistry . Walter de Gruyter, 1952, ISBN 978-3-11-143954-9 , pp. 442 ( limited preview in Google Book search).
- Rudolf Keim: Silver Part B 2. Compounds with bromine, iodine and astatine . Springer-Verlag, 2013, ISBN 978-3-662-13330-9 , pp. 94 ( limited preview in Google Book search).
- RW BERRIMAN, RH HERZ: Twinning and the Tabular Growth of Silver Bromide Crystals. In: Nature. 180, 1957, p. 293, doi : 10.1038 / 180293a0 .