Radium chlorate - Misplaced Pages

Radium chlorate
Identifiers
CAS Number	98966-82-6
3D model (JSmol)	Interactive image
InChI InChI=1S/2ClHO3.Ra/c22-1(3)4;/h2(H,2,3,4);/q;;+2/p-2Key: VTNHQTZHOLOTIS-UHFFFAOYSA-L InChI=1/Ra.2ClHO3/c;22-1(3)4/h;2(H,2,3,4)/q+2;;/p-2
SMILES .Cl(=O)=O.Cl(=O)=O
Properties
Chemical formula	Ra(ClO₃)₂
Related compounds
Related compounds	Barium chlorate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Chemical compound

Radium chlorate is an inorganic compound with formula Ra(ClO₃)₂.

While pure radium chlorate has never been prepared, it is known to form coprecipitates using barium chlorate as a carrier. These react with excess ammoniacal ammonium carbonate to form a mixed precipitate of radium carbonate with barium carbonate.

Predicted values of its thermodynamic properties are available from Lowson (1985).

Synthesis

Solutions containing radium chlorate may be obtained by dissolving soluble radium salts in a solution of barium chlorate:

Ra + Ba(ClO₃)₂ → Ra(ClO₃)₂ + Ba

Applications

It is claimed to have application in the production of self luminous watch components.

References

^ Kubach, Isa; Weigel, Fritz (1977). Radium: Supplementary volumes 1–2. Gmelin Handbook of Inorganic Chemistry (8th ed.). Springer-Verlag. p. 364. ISBN 978-0-387-93335-1.
^ Bertrand Goldschmidt (5 October 1936). "RADIOACTIVITÉ. Coefficient de fractionnement du radium et de ses isotopes dans la cristallisation du chlorate de baryum. Note de M. Bertrand GOLDSCHMIDT, présentée par M. Paul Langevin" [RADIOACTIVITY. Fractionation coefficient of radium and its isotopes in the crystallization of barium chlorate. Note by Mr. Bertrand GOLDSCHMIDT, presented by Mr. Paul Langevin.]. Comptes rendus hebdomadaires des séances de l'Académie des sciences (in French). pp. 617–618. Retrieved 20 November 2024. Pour mesurer l'activité d'une prise d'essai, le chlorate était transformé en carbonate par précipitation à chaud par un excès de carbonate d'ammonium en présence d'ammoniaque (opération qui, je l'ai vérifié, ne change pas le rapport Ra/Ba). ... Pour le radium j'ai utilisé 1 milligramme-élément, ce qui correspond à une concentration Ra/Ba d'environ 10, tandis qu'il y avait AcX/Ba d'environ 10 et ThX/Ba d'environ 10.
Lowson, R.T. (September 1985). "The thermochemistry of radium". Thermochimica Acta. 91: 185–212. doi:10.1016/0040-6031(85)85214-X.
World Surface Coatings Abstracts. Vol. 45. Research Association of British Paint, Colour & Varnish Manufacturers. 1972. p. 453. One or more radioactive substances selected from promethium, tritium and radium is applied on the surface of the dial plate, etc to give self luminous properties. e.g. by immersing it in an aq soln of promethium or radium chlorate or nitrate.