Strontium iodide (SrI2)-Beads introduce:
Strontium iodide (SrI2) is a salt of strontium and iodine. It is an ionic, water-soluble, and deliquescent compound that can be used in medicine as a substitute for potassium iodide .
Chemical formula：SrI2 (anhydrous)
Molar mass：341.43 g/mol (anhydrous)
Appearance：Colorless to white crystalline plates
Density：4.55 g/cm3 (anhydrous)
4.40 g/cm3 (hexahydrate)
Melting point：507 to 645 °C (945 to 1,193 °F; 780 to 918 K)
Boiling point：1,773 °C (3,223 °F; 2,046 K) (decomposes)
Solubility in water：177.0 g/100 mL (20 °C)
Solubility in ethanol：3.1 g/100 ml (4 °C)
Magnetic susceptibility (χ)：−112.0·10−6 cm3/mol
Crystal structure：Orthorhombic, oP24
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. In recent years, europium-doped strontium iodide (SrI2: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 LaBr3:Ce3+.
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