Strontium iodide

Names
IUPAC name

Strontium iodide

Identifiers

CAS Number

* 10476-86-5 (anhydrous) Y

3D model (JSmol)

* Interactive image
* Interactive image

ChemSpider |

* 23637

EC Number |

* 233-972-1

PubChem CID

* 25304

RTECS number |

* WK9275000

UNII |

* F6V5HOR0O5 Y

InChI

* InChI=1S/2HI.Sr/h2*1H;/q;;+2/p-2

SMILES

* I[Sr]I

* [Sr+2].[I-].[I-]

Properties

Chemical formula

| SrI
2 (anhydrous)
SrI
2 * 6H2O (hexahydrate)
Molar mass | 341.43 g·mol−1 (anhydrous)
Appearance  | Colorless to white crystalline plates
Density | 4.55 g/cm3 (anhydrous)[1]
4.40 g/cm3 (hexahydrate)[1]
Melting point |  507 to 645 °C (945 to 1,193 °F; 780 to 918 K)[3]
Boiling point |  1,773 °C (3,223 °F; 2,046 K) (decomposes)

Solubility in water

| 177.0 g/100 mL (20 °C)[2]
Solubility in ethanol | 3.1 g/100 ml (4 °C) [2]

Magnetic susceptibility (χ)

| −112.0·10−6 cm3/mol
Structure

Crystal structure

| Orthorhombic, oP24

Space group

| Pbca, No. 61
Hazards
Main hazards | Corrosive
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H314

GHS precautionary statements

| P280, P305+351+338, P310
NFPA 704 (fire diamond)  |

Related compounds

Other anions

| strontium fluoride
strontium chloride
strontium bromide

Other cations

| beryllium iodide
magnesium iodide
calcium iodide
barium iodide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N verify (what is YN ?)
Infobox references

Strontium iodide is an inorganic compound with the chemical formula SrI
2. It is a salt of strontium and iodine. It forms a hexahydrate SrI
2 * 6H2O. It is an ionic, water-soluble, and deliquescent compound that can be used in medicine as a substitute for potassium iodide.[5] It is also used as a scintillation gamma radiation detector, typically doped with europium, due to its optical clarity, relatively high density, high effective atomic number (Z=48), and high scintillation light yield.[6] In recent years, europium-doped strontium iodide (SrI
2:Eu2+) 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 LaBr
3:Ce3+. Large diameter SrI
2 crystals can be grown reliably using vertical Bridgman technique [7] and are being commercialized by several companies.[8][9]

## Reactions

Strontium iodide can be prepared by reacting strontium carbonate with hydroiodic acid:

SrCO
3 \+ 2 HI(aq) → SrI
2 \+ H
2O \+ CO

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.[10]

## References

1. ↑ 1.0 1.1 Yaws, C.L. (2008). Thermophysical properties of chemicals and hydrocarbons. William Andrew. ISBN 978-0-8155-1596-8. https://books.google.com/books?id=31O4upzTHQwC.
2. ↑ 2.0 2.1
177 g/100 mL (20 °C)Seidell, Atherton (1907), Solubilities of Inorganic and Organic Substances, New York: D. Van Nostrand, pp. 318, https://books.google.com/books?id=7Y8AAAAAMAAJ&pg=PA318, retrieved 2007-12-10
3. ↑ Turner, Jr., Francis M., ed. (1920), The Condensed Chemical Dictionary, New York: The Chemical Catalog Company, pp. 449, https://books.google.com/books?id=y8y0XE0nsYEC&pg=PA449, retrieved 2007-12-10
4. ↑ "Strontium iodide". Sigma Aldrich. https://www.sigmaaldrich.com/AU/en/product/ALDRICH/400696.
5. ↑ Shoemaker, John V. (1908), A Practical Treatise on Materia Medica and Therapeutics (7th ed.), Philadelphia: F. A. Davis, pp. 854, https://books.google.com/books?id=E-1xq8ScRD8C&pg=RA1-PA854, retrieved 2007-12-10
6. ↑ Prettyman, Thomas; Burger, Arnold; Yamashita, Naoyuki; Lambert, James; Stassun, Keivan; Raymond, Carol (2015). "Ultra-bright scintillators for planetary gamma-ray spectroscopy". SPIE Newsroom. doi:10.1117/2.1201510.006162. ISSN 1818-2259.
7. ↑ Datta, A.; Lam, S.; Swider, S.; Motakef, S. (October 2016). "Crystal growth of large diameter strontium iodide scintillators using in Situ stoichiometry monitoring". 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD). pp. 1–4. doi:10.1109/NSSMIC.2016.8116640. ISBN 978-1-5090-1642-6.
8. ↑ Inc., CapeSym. "CapeSym | SrI2(Eu)". http://www.capesym.com/sri2.html.
9. ↑ "Strontium Iodide | RMD" (in en-US). http://rmdinc.com/strontium-iodide/.
10. ↑ Bartley, Elias H. (1898), Text-book of Medical and Pharmaceutical Chemistry (5th ed.), Philadelphia: P. Blakiston, pp. 267–268, https://books.google.com/books?id=qdwUkA_aHWsC&pg=PA267, retrieved 2007-12-10

* v
* t
* e

Strontium compounds

* SrAl2O4
* SrB6
* SrBr2
* Sr(BrO3)2
* SrCO3
* SrCl2
* Sr(ClO3)2
* SrCrO4
* SrF2
* SrI2
* Sr(NO3)2
* SrO
* SrO2
* Sr(OH)2
* SrS
* SrSO4
* SrTiO3
* Sr3N2
* Sr2RuO4

HI |  |  |  | He

|
|
|
|

LiI | BeI2 | BI3 | CI4 | NI3 | I2O4,
I2O5,
I4O9 | IF,
IF3,
IF5,
IF7 | Ne
NaI | MgI2 | AlI3 | SiI4 | PI3,
P2I4 | S  | ICl,
ICl3 | Ar
KI | CaI2 | Sc  | TiI4 | VI3 | CrI3 | MnI2 | FeI2 | CoI2 | NiI2 | CuI | ZnI2 | Ga2I6 | GeI2,
GeI4 | AsI3 | Se  | IBr | Kr
RbI | SrI2 | YI3 | ZrI4 | NbI5 | Mo  | Tc  | Ru  | Rh  | Pd  | AgI | CdI2 | InI3 | SnI4,
SnI2 | SbI3 | TeI4 | I  | Xe
CsI | BaI2 |  | HfI4 | TaI5 | W  | Re  | Os  | Ir  | Pt  | AuI | Hg2I2,
HgI2 | TlI | PbI2 | BiI3 | Po  | AtI | Rn
Fr  | RaI2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
La  | Ce  | Pr  | Nd  | Pm  | SmI2 | Eu  | Gd  | TbI3 | Dy  | Ho  | Er  | Tm  | Yb  | Lu
Ac  | ThI4 | Pa  | UI3,
UI4 | Np  | Pu  | Am  | Cm  | Bk  | Cf  | EsI3 | Fm  | Md  | No  | Lr

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*[CID]: Compound ID
*[H314]: Causes severe skin burns and eye damage
*[P280]: Wear protective gloves/protective clothing/eye protection/face protection
*[P305+351+338]: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing
*[P310]: Immediately call a POISON CENTER or doctor/physician
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