Rubidium iodate
Structural formula | |||||||||||||
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Crystal system |
rhombohedral |
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Space group |
R 3 m (No. 160) |
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Lattice parameters |
a = 641.3 pm, c = 789.2 pm |
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General | |||||||||||||
Surname | Rubidium iodate | ||||||||||||
Molecular formula | RbIO 3 | ||||||||||||
External identifiers / databases | |||||||||||||
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properties | |||||||||||||
Molar mass | 260.37 g · mol -1 | ||||||||||||
Physical state |
firmly |
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density |
4.33 g cm −3 |
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Melting point |
decomposition |
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solubility |
21 g l −1 (23 ° C) |
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safety instructions | |||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Rubidium iodate is the rubidium salt of iodic acid .
Manufacturing
Rubidium iodate can be made from stoichiometric amounts of rubidium carbonate and iodic anhydride .
properties
Physical Properties
Rubidium iodate crystallizes in the trigonal crystal system in the space group R 3 m (space group no. 160) with the lattice parameters a = 641.3 pm, c = 789.2 pm and 3 formula units per unit cell . Rubidium iodate is easily soluble in hydrochloric acid and turns yellow. The crystals are isomorphic with the crystals of potassium iodate .
Chemical properties
When heated, rubidium iodate decomposes into rubidium iodide and oxygen :
By introducing chlorine into a hot concentrated solution of rubidium iodate and rubidium hydroxide , rubidium periodate is produced .
Rubidium iodate reacts with hydrofluoric acid to form rubidium difluoroiodate, which forms orthorhombic crystals.
Individual evidence
- ↑ a b c d e Jean D'Ans, Ellen Lax: Paperback for chemists and physicists. 3. Elements, inorganic compounds and materials, minerals, Volume 3. 4. Edition, Springer, 1997, ISBN 978-3-5406-0035-0 , pp. 686f. ( limited preview in Google Book search).
- ↑ a b c R. Abegg, F. Auerbach: Handbook of inorganic chemistry . Verlag S. Hirzel, Vol. 2, 1908. P. 431 ( full text ).
- ↑ harmonized classification for this substance . A labeling of Rubidium iodate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), retrieved on July 12, 2020, is reproduced from a self-classification by the distributor . There is not yet a
- ↑ Thomas Vipond Barker: II . ? Note on the iodates and periodates of the alkali metals and the ammonium radicle. In: Journal of the Chemical Society, Transactions. 93, 1908, p. 15, doi : 10.1039 / CT9089300015 .
- ↑ RF Weinland, O. Lauenstein: "About Fluoriodates" in Zeitschr. f. Anorg. Chem. 1899 , 20 (1), pp. 30-39 ( full text ).