Barium iodide
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Barium iodide is an inorganic compound with the formula BaI2. The compound exists as an anhydrous and a hydrate (BaI2(H2O)2), both of which are white solids. When heated, hydrated barium iodide converts to the anhydrous salt. The hydrated form is freely soluble in water, ethanol, and acetone.
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Barium iodide | |
Other names
Barium iodide, anhydrous | |
Identifiers | |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.033.873 |
EC Number |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
BaI2 (anhydrous) BaI2·2H2O (dihydrate) | |
Molar mass | 391.136 g/mol (anhydrous) 427.167 g/mol (dihydrate) |
Appearance | White orthorhombic crystals (anhydrous) colorless crystals (dihydrate) |
Odor | odorless |
Density | 5.15 g/cm3 (anhydrous) 4.916 g/cm3 (dihydrate) |
Melting point | 711 °C (1,312 °F; 984 K) (anhydrous) decomposes at 740 °C (dihydrate) |
166.7 g/100 mL (0 °C) 221 g/100 mL (20 °C) 246.6 g/100 mL (70 °C) | |
Solubility | soluble in ethanol, acetone |
-124.0·10−6 cm3/mol | |
Structure | |
PbCl2-type (Orthorhombic oP12) | |
Pnma (No. 62) | |
Thermochemistry | |
Std enthalpy of formation (ΔfH⦵298) |
-602.1 kJ·mol−1 |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
toxic |
Related compounds | |
Other anions |
barium fluoride barium chloride barium bromide |
Other cations |
beryllium iodide magnesium iodide calcium iodide strontium iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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