Calcium iodide

Chembox new
Name = Calcium iodide
ImageFile =
ImageSize = 200px
ImageName = Calcium iodide
IUPACName = calcium iodide
Section1 = Chembox Identifiers
CASNo = 10102-68-8
RTECS = EV1300000
Section2 = Chembox Properties
Formula = CaI₂

MolarMass = 293.89 g/mol, anhydrous
Appearance = white to light yellow solid
Density = 3.956 g/cm³Citation
last =
first =
author-link =
last2 =
first2 =
author2-link =
editor-last= Turner, Jr.
editor-first= Francis M.
editor-link=
publication-date =
date =
year = 1920
title = The Condensed Chemical Dictionary
edition = First
volume =
series =
publication-place = New York
place =
publisher = The Chemical Catalog Company
id =
isbn =
doi =
oclc =
pages = 127
url = http://books.google.com/books?id=y8y0XE0nsYEC&pg=PA127&dq=%22calcium+iodide%22+properties&as_brr=1&ei=lUhbR8iyIpDIiQHsqKW7BA
accessdate = 2007-12-08]
Solubility = ?
MeltingPt = 740 °C
BoilingPt = 1100 °C
Section3 = Chembox Structure
Coordination =
CrystalStruct =
Section7 = Chembox Hazards
EUClass =
NFPA-H = 1
NFPA-F =
NFPA-R =
RPhrases =
SPhrases = S24, S25, S28, S37, S45 [http://www.sciencelab.com/xMSDS-Calcium_iodide-9923259]
Section8 = Chembox Related
OtherAnions = calcium fluoride
calcium bromide
calcium chloride
OtherCations = magnesium iodide
strontium iodide

Calcium iodide (CaI₂) is an ionic compound of calcium and iodine. It is highly soluble in water and it is deliquescent. It is a salt that is solid at room temperature, and it behaves as a typical ionic halide. Because of its hygroscopic nature, it must be kept in tightly-sealed containers. It is similar to calcium chloride in many respects [Citation
last = Mendeleyev
first = Dmitry Ivanovich
author-link = Dmitri Mendeleev
last2 = Kamensky
first2 = George
author2-link
publication-date =
date =
year = 1902
title = The Principles of Chemistry
edition =
volume =
series =
publication-place = New York
place =
publisher = P. F. Collier
id =
isbn =
doi =
oclc =
pages = 604
url = http://books.google.com/books?id=BrE93bC50wAC&pg=RA4-PA604&dq=%22calcium+iodide%22&as_brr=1&ei=LUdbR5OfIYmMiQHcjLCvBA
accessdate = 2007-12-08] . It is used in photography.

Reactions

Henri Moissan first isolated pure calcium metal by reducing calcium iodide with pure sodium metal [Citation
last = Mellor
first = Joseph William
author-link =
last2 =
first2 =
author2-link
publication-date =
date =
year = 1912
title = Modern Inorganic Chemistry
edition =
volume =
series =
publication-place = New York
place =
publisher = Longmans, Green, and Co
id =
isbn =
doi =
oclc =
pages = 334
url = http://books.google.com/books?id=wEoJAAAAIAAJ&pg=PA334&dq=%22calcium+iodide%22+subject:%22Chemistry,+Inorganic%22&as_brr=1&ei=ZUJbR7CEA5vOiQGmn-2GBA
accessdate = 2007-12-08] ::CaI₂ + 2Na → 2NaI + Ca

Calcium iodide can be formed by reacting calcium carbonate with hydroiodic acid [Citation
last = Gooch
first = Frank Austin
author-link =
last2 = Walker
first2 =Claude Frederic
author2-link
publication-date =
date =
year = 1905
title = Outlines of Inorganic Chemistry
edition =
volume =
series =
publication-place = New York
place =
publisher = Macmillan
id =
isbn =
doi =
oclc =
pages = 340
url = http://books.google.com/books?id=q8MMAAAAYAAJ&pg=RA1-PA340&dq=%22calcium+iodide%22+subject:%22Chemistry,+Inorganic%22&as_brr=1&ei=uEJbR832JJPuiQGqzqWKBA
accessdate = 2007-12-08] ::CaCO₃ + 2HI → CaI₂ + H₂O + CO₂

Calcium iodide slowly reacts with oxygen and carbon dioxide in the air, giving free iodine [Citation
last = Jones
first = Harry Clary
author-link =
last2 =
first2 =
author2-link
publication-date =
date =
year = 1906
title = Principles of Inorganic Chemistry
edition =
volume =
series =
publication-place = New York
place =
publisher = Macmillan
id =
isbn =
doi =
oclc =
pages = 365
url = http://books.google.com/books?id=zWE6AAAAMAAJ&pg=PA365&dq=%22calcium+iodide%22+subject:%22Chemistry,+Inorganic%22&as_brr=1&ei=RUJbR4z9I4yEiQGaw5X3Aw
accessdate = 2007-12-08] .

References