View source for Strontium iodide

{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 439308815
| ImageFile = Strontium-iodide-unit-cell-3D-balls.png
| ImageSize = 
| IUPACName = Strontium iodide
| SystematicName = 
| OtherNames = 
|Section1={{Chembox Identifiers
| Abbreviations = 
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 10476-86-5
| CASNo_Comment = (anhydrous)
| ChemSpiderID = 23637
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = F6V5HOR0O5
| EINECS = 233-972-1
| PubChem = 25304
| SMILES = I[Sr]I
| SMILES2 = [Sr+2].[I-].[I-]
| InChI = 1S/2HI.Sr/h2*1H;/q;;+2/p-2
| RTECS = WK9275000}}
|Section2={{Chembox Properties
| Formula = {{chem2|SrI2}} (anhydrous)<br>{{chem2|SrI2*6H2O}} (hexahydrate)
| Sr=1|I=2
| MolarMass_notes = (anhydrous)
| Appearance = Colorless to white crystalline plates
| Density = 4.55 g/cm<sup>3</sup> (anhydrous)<ref name=yaws>{{Cite book| title =Thermophysical properties of chemicals and hydrocarbons| author =Yaws, C.L.| isbn =978-0-8155-1596-8| url =https://books.google.com/books?id=31O4upzTHQwC| year =2008| publisher =William Andrew}}</ref><br>4.40 g/cm<sup>3</sup> (hexahydrate)<ref name=yaws/>
| MeltingPtC = 507 to 645
| MeltingPt_ref = <ref>{{Citation | editor-last= Turner, Jr. | editor-first=Francis M. | year =1920 | title =The Condensed Chemical Dictionary | location =New York | publisher =The Chemical Catalog Company | pages = 449 | url =https://books.google.com/books?id=y8y0XE0nsYEC&pg=PA449 |access-date = 2007-12-10}}</ref>
| BoilingPtC = 1773
| BoilingPt_notes = (decomposes) 
| Solubility = 177.0 g/100 mL (20 °C)<ref name = "Seidell"><br> 177 g/100 mL (20 °C){{Citation | last =Seidell| first =Atherton | year =1907 | title =Solubilities of Inorganic and Organic Substances | location =New York | publisher =D. Van Nostrand | pages = 318| url =https://books.google.com/books?id=7Y8AAAAAMAAJ&pg=PA318 | access-date = 2007-12-10}}</ref>
| SolubleOther = 3.1 g/100 ml (4 °C) <ref name = "Seidell"/>
| Solvent = [[ethanol]] 
| LogP = 
| VaporPressure = 
| HenryConstant = 
| AtmosphericOHRateConstant = 
| pKa = 
| pKb = 
| MagSus = &minus;112.0·10<sup>−6</sup> cm<sup>3</sup>/mol}}
|Section3={{Chembox Structure
| CrystalStruct = [[Orthorhombic]], [[Pearson symbol|''oP24'']]
| SpaceGroup = Pbca, No. 61 
 }}
|Section4={{Chembox Thermochemistry
| DeltaHf = 
| DeltaHc = 
| Entropy = 
| HeatCapacity = }}
|Section5={{Chembox Pharmacology
| PregCat_US = }}
|Section7={{Chembox Hazards
| MainHazards = Corrosive
| NFPA-H = 1
| NFPA-F = 0
| NFPA-R = 0
| NFPA-S =
| GHS_ref = <ref>{{cite web |title=Strontium iodide |url=https://www.sigmaaldrich.com/AU/en/product/ALDRICH/400696 |publisher=Sigma Aldrich}}</ref>
| GHSPictograms = {{GHS05}}
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|314}}
| PPhrases = {{P-phrases|280|305+351+338|310}}
| FlashPt = 
| AutoignitionPt = 
| ExploLimits = 
| LD50 =
| PEL = }}
|Section8={{Chembox Related
| OtherAnions = [[strontium fluoride]]<br>[[strontium chloride]]<br>[[strontium bromide]]
| OtherCations = [[beryllium iodide]]<br/>[[magnesium iodide]]<br/>[[calcium iodide]]<br/>[[barium iodide]]
| OtherFunction = 
| OtherFunction_label = 
| OtherCompounds = 
 }}
}}
'''Strontium iodide''' is an [[inorganic compound]] with the [[chemical formula]] {{chem2|SrI2|auto=1}}. It is a [[salt (chemistry)|salt]] of [[strontium]] and [[iodine]]. It forms a [[hexahydrate]] {{chem2|SrI2*6H2O}}. It is an ionic, water-soluble, and [[deliquescent]] compound that can be used in medicine as a substitute for [[potassium iodide]].<ref>{{Citation | last =Shoemaker | first =John V. | year =1908 | title =A Practical Treatise on Materia Medica and Therapeutics | edition =7th | location =Philadelphia | publisher =F. A. Davis | pages = 854 | url =https://books.google.com/books?id=E-1xq8ScRD8C&pg=RA1-PA854 | access-date = 2007-12-10}}</ref>
It is also used as a [[scintillation (physics)|scintillation]] [[gamma radiation]] detector, typically [[Doping (semiconductor)|doped]] with [[europium]], due to its optical clarity, relatively high density, high [[effective atomic number (compounds and mixtures)|effective atomic number]] (Z=48), and high scintillation light yield.<ref name="PrettymanBurger2015">{{cite journal|last1=Prettyman|first1=Thomas|last2=Burger|first2=Arnold|last3=Yamashita|first3=Naoyuki|last4=Lambert|first4=James|last5=Stassun|first5=Keivan|last6=Raymond|first6=Carol|title=Ultra-bright scintillators for planetary gamma-ray spectroscopy|journal=SPIE Newsroom|year=2015|issn=1818-2259|doi=10.1117/2.1201510.006162}}</ref> In recent years, europium-doped strontium iodide ({{chem2|SrI2}}:{{chem2|Eu(2+)}}) has emerged as a promising scintillation material for gamma-ray spectroscopy with extremely high light yield and proportional response, exceeding that of the widely used high performance commercial scintillator {{chem2|LaBr3}}:{{chem2|Ce(3+)}}. Large diameter {{chem2|SrI2}} crystals can be grown reliably using vertical Bridgman technique <ref>{{Cite book|last1=Datta|first1=A.|last2=Lam|first2=S.|last3=Swider|first3=S.|last4=Motakef|first4=S.|title=2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD) |chapter=Crystal growth of large diameter strontium iodide scintillators using in Situ stoichiometry monitoring |date=October 2016|pages=1–4|doi=10.1109/NSSMIC.2016.8116640|isbn=978-1-5090-1642-6|s2cid=31775311}}</ref> and are being commercialized by several companies.<ref>{{Cite web|url=http://www.capesym.com/sri2.html|title=CapeSym {{!}} SrI<sub>2</sub>(Eu)|last=Inc.|first=CapeSym|website=www.capesym.com|access-date=2018-02-13}}</ref><ref>{{Cite web|url=http://rmdinc.com/strontium-iodide/|title=Strontium Iodide {{!}} RMD|website=rmdinc.com|language=en-US|access-date=2018-02-13|archive-date=2018-02-14|archive-url=https://web.archive.org/web/20180214051051/http://rmdinc.com/strontium-iodide/|url-status=dead}}</ref>

==Reactions==
Strontium iodide can be prepared by reacting [[strontium carbonate]] with [[hydroiodic acid]]:
:{{chem2|[[strontium carbonate|SrCO3]] + 2 [[hydroiodic acid|HI(aq)]] → SrI2 + [[water|H2O]] + [[carbon dioxide|CO2]]}}

Strontium iodide forms a white powder that slowly changes to a yellowish colour when exposed to air. At high temperatures (in the presence of air) strontium iodide completely decomposes to form [[strontium oxide]] and free [[iodine]].<ref>
{{Citation|last =Bartley| first =Elias H.|year =1898|title =Text-book of Medical and Pharmaceutical Chemistry| edition =5th|location =Philadelphia|publisher =P. Blakiston|pages = 267–268| url =https://books.google.com/books?id=qdwUkA_aHWsC&pg=PA267|access-date = 2007-12-10}}</ref>

==References==
<references/>

{{Strontium compounds}}
{{Iodides}}

[[Category:Iodides]]
[[Category:Strontium compounds]]
[[Category:Alkaline earth metal halides]]