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Beryllium iodide



Beryllium iodide
General
Systematic name Beryllium iodide
Molecular formula BeI2
Molar mass 262.821 g/mol
Appearance colorless needle-like crystals
CAS number [7787-53-3]
Properties
Density and phase 4.325 g/cm³, solid
Solubility Reacts violently with water[1]
Slightly soluble in CS2
Soluble in ethanol[2]
Melting point 510°C
Boiling point 590°C[1]
Hazards
Main hazards see Berylliosis
NFPA 704
R/S statement R: ?
S: ?
RTECS number  ?
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

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]:

Be + I2 → BeI2

Beryllium iodide is also formed when beryllium carbide with hydrogen iodide in the gas phase:

Be2C + 4 HI → 2 BeI2 + CH4

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].


References

  1. ^ a b c Perry, Dale L. & Phillips, Sidney L., , CRC Press, pp. 63, ISBN 0849386713, . Retrieved on 2007-12-10
  2. ^ a b Parsons, Charles Lathrop, written at Easton, Pa., , Chemical Publishing, pp. 22-23, . Retrieved on 2007-12-10
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Beryllium_iodide". A list of authors is available in Wikipedia.
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