Radium nitrate

Radium nitrate
Names
	Other names Radium(II) nitrate; Radium dinitrate;
Identifiers
CAS Number	10213-12-4;
3D model (JSmol)	Interactive image;
ChemSpider	67037400;
	InChI InChI=1S/2NO3.Ra/c22-1(3)4;/q2-1;+2 Key: AMLSLPXXUHKKSF-UHFFFAOYSA-N;
	SMILES [Ra+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O;
Properties
Chemical formula	Ra(NO3)2
Molar mass	350.01 g/mol
Appearance	White solid
Melting point	280 °C (536 °F; 553 K) (decomposes)
Solubility in water	13.9 g/100 ml
Solubility in nitric acid	Insoluble
Related compounds
Other anions	Radium carbonate
Other cations	Barium nitrate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Radium nitrate is a radioactive salt with the formula Ra(NO₃)₂. It is a white solid, but old samples appear yellowish-grey. Although radium chloride and radium bromide are less soluble than the corresponding barium salts, radium nitrate is more soluble than barium nitrate.^[1]^[2] It decomposes at 280 °C to radium oxide.

Production

Radium nitrate is produced by the reaction of radium carbonate or radium sulfate with nitric acid:^[2]

RaCO₃ + HNO₃ → Ra(NO₃)₂ + CO₂ + H₂O

References

^ ^a ^b Otto Erbacher (1930). "Löslichkeits-Bestimmungen einiger Radiumsalze" [Solubility determinations of some radium salts]. Chemische Berichte (in German). 63 (1): 141–156. doi:10.1002/cber.19300630120.
^ ^a ^b Kirby, H. W.; Salutsky, Murrell L. (1964). The Radiochemistry of Radium (PDF). National Academies Press. pp. 4–8.

[sol-1] Otto Erbacher (1930). "Löslichkeits-Bestimmungen einiger Radiumsalze" [Solubility determinations of some radium salts]. Chemische Berichte (in German). 63 (1): 141–156. doi:10.1002/cber.19300630120.

[:0-2] Kirby, H. W.; Salutsky, Murrell L. (1964). The Radiochemistry of Radium (PDF). National Academies Press. pp. 4–8.

[1]

[2]