Rubidium tetrathionate

Rubidium trithionate, Rb2S306.—When rubidium persulphate reacts with somewhat more than twice the molecular proportion of strontium thiosulphate in solution, rubidium tetrathionate is formed ... 

The strontium sulphite produced by decomposition of the excess of strontium thiosulphate then reacts with the rubidium tetrathionate, forming trithionate ... 

Rubidium tetrathionate, Rb2S406.—The tetrathionate is prepared by the method just indicated,4 and is also formed by the action of iodine on the thiosulphate.5... 

Until 1950 the only X-ray crystallographic work on polythionates was Zachariasen s structure determination of potassium trithionate (239) published in 1934, a partial structure analysis of thallium trithionate by Ketelaar and Sanders (151) in 1936, and unit cell and space group determinations of rubidium trithionate (161) and potassium tetrathionate (218). Since then, surveys of unit cells and space groups of tetra-, penta-, and hexathionates and selenotrithionates, selenopentathionates, and telluropentathionates have been made, and structure determinations of two tetrathionates, three pentathionates, one selenopentathionate, two telluropentathionates, and two hexathionates have been carried out. 

The isomorphous potassium (218) and rubidium (91) salts have large cells with two tetrathionate ions in the asymmetric unit. 

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See also in sourсe #XX -- [ ]

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