Radium iodide
Chemical compound
From Wikipedia, the free encyclopedia
Radium iodide is an inorganic compound of radium and iodine with the chemical formula RaI2.[1][2] It is the radium salt of hydrogen iodide, consisting of radium cations Ra2+ and iodide anions I−.
| Names | |
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| Other names
Radium diiodide | |
| Identifiers | |
3D model (JSmol) |
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| Properties | |
| RaI2 | |
| Molar mass | 480 g·mol−1 |
| Appearance | yellow solid |
| Density | 5.83 g/cm3[1] |
| soluble | |
| Related compounds | |
Other anions |
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Other cations |
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Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis
The salt is synthesized by the reaction of radium carbonate with hydroiodic acid:[1]
- RaCO3 + 2 HI(aq) → RaI2 + H2O + CO2
Properties
Radium iodide crystalises in the orthorhombic system with space group Pmcn. The unit cell has a = 9.22 b = 10.93 and c = 5.42 Å with 4 formulas per unit cell.[3]