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The decompositions of sodium thiosulphate, dithionite, pyrosulphite, dithionate, hydrogen sulphate, tetrathionate, and of potassium persulphate were studied thermogravimetrically from room temperature to 800°. The products were isolated by heating samples to constant weight at their decomposition temperatures and were investigated by i.r. studies on their Nujol mulls.
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Cleghorn et al. (1970) studied this question.
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