Beryllium iodide
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| Beryllium iodide | |
|---|---|
| Systematic name | Beryllium iodide |
| Identifiers | |
| CAS number | [7787-53-3] |
| Properties | |
| Molecular formula | BeI2 |
| Molar mass | 262.821 g/mol |
| Appearance | colorless needle-like crystals |
| Density | 4.325 g/cm³ |
| Melting point |
510°C |
| Boiling point |
590°C[1] |
| Solubility in water | Reacts violently with water[1] |
| Solubility | Slightly soluble in CS2 Soluble in ethanol[2] |
| Hazards | |
| Main hazards | see Berylliosis |
| Related compounds | |
| Other anions | Beryllium fluoride Beryllium chloride Beryllium bromide |
| Other cations | Magnesium iodide Calcium iodide |
| 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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Beryllium iodide is the chemical compound with the formula BeI2. It is very hygroscopic and reacts violently with water, forming hydroiodic acid.
[edit] 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 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 fluoride, and with bromine giving beryllium bromide. The solid and vapor are both flammable in air[2].
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[edit] References
- ^ a b c Perry, Dale L. & Phillips, Sidney L., Handbook of Inorganic Compounds, CRC Press, pp. 63, ISBN 0849386713, <http://books.google.com/books?id=0fT4wfhF1AsC&printsec=frontcover&dq=%22beryllium+iodide%22+properties&as_brr=3#PPA63,M1>. Retrieved on 2007-12-10
- ^ a b Parsons, Charles Lathrop, written at Easton, Pa., The Chemistry and Literature of Beryllium, Chemical Publishing, pp. 22-23, <http://books.google.com/books?id=7MxAAAAAIAAJ&pg=PA21&dq=%22beryllium+iodide%22&as_brr=3#PPA22,>. Retrieved on 2007-12-10
