Beryllium iodide
| Beryllium iodide | |
|---|---|
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| Systematic name Beryllium iodide | |
| Identifiers | |
| CAS number | 7787-53-3  |
| PubChem | 82231 |
| ChemSpider | 74209 |
| Jmol-3D images | {{#if:[Be+2].[I-].[I-]|Image 1 |
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| Properties | |
| Molecular formula | BeI2 |
| Molar mass | 262.821 g/mol |
| Appearance | colorless needle-like crystals |
| Density | 4.325 g/cm³ |
| Melting point | 480°C |
| Boiling point | 590°C[1] |
| Solubility in water | Reacts explosively with water[1][citation needed] |
| Solubility | Slightly soluble in CS2 Soluble in ethanol[2] |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
-192,62 kJ/mol |
| Specific heat capacity, C | 71,14 J/(mol × K) |
| Hazards | |
| Main hazards | see Berylliosis |
| Related compounds | |
| Other anions | Beryllium fluoride Beryllium chloride Beryllium bromide |
| Other cations | magnesium iodide calcium iodide strontium iodide barium iodide |
(verify) (what is: / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | |
| Infobox references | |
Beryllium iodide is the chemical compound with the formula BeI2. It is very hygroscopic and reacts violently with water, forming hydroiodic acid.
Reactions
Beryllium iodide can be prepared by reacting beryllium metal with elemental iodine at temperatures of 500°C to 700°C:[1]
Beryllium iodide is also formed when beryllium carbide reacts with hydrogen iodide in the gas phase:
The iodine in beryllium iodide is easily replaced with the other halogens; it reacts with fluorine giving beryllium fluoride and fluorides of iodine, with chlorine giving beryllium chloride, and with bromine giving beryllium bromide. Beryllium iodide also reacts violently with oxidising agents such as chlorate and permanganate to give purple vapour of iodine. The solid and vapor are both flammable in air.[2]
References
- ↑ 1.0 1.1 1.2 Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, p. 63, ISBN 0-8493-8671-3, retrieved 2007-12-10
- ↑ 2.0 2.1 Parsons, Charles Lathrop (1909), The Chemistry and Literature of Beryllium, Easton, Pa.: Chemical Publishing, pp. 22–23, retrieved 2007-12-10
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