Strontium iodide

Strontium iodide
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Template:Longitem	Template:Chem2 (anhydrous); Template:Chem2 (hexahydrate)
Molar mass	Template:Chem molar mass
Appearance	Colorless to white crystalline plates
Density	4.55 g/cm3 (anhydrous); 4.40 g/cm3 (hexahydrate)
Melting point	Template:Chembox CalcTemperatures
Boiling point	Template:Chembox CalcTemperatures
Solubility in ethanol	3.1 g/100 ml (4 °C)
Template:Longitem	−112.0·10−6 cm3/mol
Template:Longitem	Orthorhombic, oP24
Template:Longitem	Pbca, No. 61
NFPA 704 (fire diamond)	Template:NFPA 704 diamond
Template:Longitem	strontium fluoride; strontium chloride; strontium bromide
Template:Longitem	beryllium iodide; magnesium iodide; calcium iodide; barium iodide

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Strontium iodide is an inorganic compound with the chemical formula Template:Chem2. It is a salt of strontium and iodine. It forms a hexahydrate Template:Chem2. It is an ionic, water-soluble, and deliquescent compound that can be used in medicine as a substitute for potassium iodide.^[3] 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.^[4] In recent years, europium-doped strontium iodide (Template:Chem2:Template:Chem2) 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 Template:Chem2:Template:Chem2. Large diameter Template:Chem2 crystals can be grown reliably using vertical Bridgman technique ^[5] and are being commercialized by several companies.^[6]^[7]

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

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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.^[8]