Radium iodide

Radium iodide
Names
Other names Radium diiodide
Identifiers
CAS Number	20610-52-0^Y
3D model (JSmol)	Interactive image
InChI InChI=1S/2HI.Ra/h2*1H;/q;;+2/p-2 Key: VIUODKCIIYIXHC-UHFFFAOYSA-L
SMILES [I-].[I-].[Ra+2]
Properties
Chemical formula	RaI₂
Molar mass	480 g·mol⁻¹
Appearance	yellow solid
Density	5.83 g/cm³^[1]
Solubility in water	soluble
Related compounds
Other anions	Radium fluoride Radium chloride Radium bromide
Other cations	Beryllium iodide Magnesium iodide Calcium iodide Strontium iodide Barium iodide Zinc iodide Cadmium iodide Mercury(II) iodide
Related compounds	Hydrogen iodide Lead(II) iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

Radium iodide is an inorganic compound of radium and iodine with the chemical formula Ra I₂.^[1]^[2] It is the radium salt of hydrogen iodide, consisting of radium cations Ra²⁺ and iodide anions I⁻.

Synthesis

The salt is synthesized by the reaction of radium carbonate with hydroiodic acid:^[1]

RaCO₃ + 2 HI(aq) → RaI₂ + H₂O + CO₂

^ ^a ^b ^c Weigel, F.; Trinkl, A. (1968). "Zur Kristallchemie des Radiums". Ract. 9: 36–41. doi:10.1524/ract.1968.9.1.36. S2CID 201843329.
^ Donnay, Joseph Désiré Hubert (1978). Crystal Data: Inorganic compounds 1967-1969. National Bureau of Standards. p. 0-160. Retrieved 7 June 2023.