Rubidium borates

VIOLET Potassium compounds other than silicates, phosphates and borates rubidium and cesium are similar. Color is masked by lithium and/or sodium, appears purple-red through cobalt glass and bluish-green glass. 

Rubeanic acid, complexes of, 3 277 Rubidium acetylide, 11 195 anion, 25 165-166 electron photodetachment, 25 166 optical spectra, 25 166 auride, 25 241 borates, 25 215 structures, 25 194 carbide, 11 195... 

The electrical conductivities of soln. of a great many compounds in liquid hydrogen halides have been measured by E. H. Archibald and D. McIntosh. The conductivity is raised considerably by phosphoryl chloride. Sodium sodium sulphide, borate, phosphate, nitrate, thiosulphate, and arsenate chromic anhydride potassium nitrate, hydroxide, chromate, sulphide, bisulphate, and ferro- and ferri- cyanide ammonium fluoride and carbonate j rubidium and caesium chloride magnesium sulphate calcium fluoride ... 

V. 1 Olivier a trace of iodine. L. Dieulafait found traces of lithium, rubidium, and caesium salt H. Beckurts, chlorates and perchlorates up to 5 64 per cent. M. Marcker, borates and humus C. F. Schfinbein, nitrites and ammonia R. Wagner, iodine and bromine. H. Griineberg says the former is present as iodate or periodate. 

Other compounds of the selenophene series such as potassium tetra(a-selenienyl)borate (23), obtained by interaction of a-selenienyl-magnesium iodide with potassium tetrafluoroborate, precipitate rubidium ions and, more completely, cesium and quaternary ammonium ions from water solutions and can be used as analytical reactants for those ions.81... 

Figure 6.10. N4 as a function of R for alkali borate glasses. L = lithium, N = sodium, K= potassium, R = rubidium, C = cesium and B = borate. Unhatched block in mixed alkali compositions represent excess N4. (After Zhong and Bray, 1989).

Rubidium. Rb at. wt 85.4678 at. no. 37 valence l. Alkali metal. Widely distributed in very small quantities in earth s crust 0.0034% by wt. Natural isotopes 85 (72.15%) 87 (27.85%) Rb is radioactive Tw 4.8 X 10 years isotopes range in mass number from 79 to 95. Found with other alkali metals in rhodizite (borate), lepidolite (aluminosilicate), rubidium camallite (chloride) in sea water in mineral springs and salt lakes. Discovered by Bunsen and Kirchhoff in 1861. Frepn Hackspill, Heh. Chim. Acta II, 1003 (1928), Review Whaley, "Sodium, Potassium, Rubidi-am. Cesium and Francium in Comprehensive Inorganic Chemistry vol. I, J. C, Bailar Jr- et of.. Eds. (Pergamon Press, Oxford, 1973) pp 369-529 F. B. White, W. G. Lidman in Kirk-Othmer Encyclopedia of Chemical Technology vol 20 (Wiley-Intersdence, New York, 3rd ed., 1982) pp 492-499. 

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