No abstract

No abstract

Notes 1099The products were analyzed for the presence of sulfate ion by digesting with 100 ml. of hot distilled water for one hour to dissolve any In2(S04)3 formed. The mixture then was filtered, washed, and the filtrate tested for the presence of sulfate ion by the usual method. Any sulfide remaining in the residues was converted into sulfate by treatment with bromine and nitric acid according to standard procedure.The results obtained show that pure In2S3 may be heated in air up to 280°with only superficial oxidation. In the temperature range 300-460°the sulfide is gradually oxidized to a mixture of sulfate and oxide, the relative amounts depending on the surface exposed, the temperature and the period of heating. There was no evidence of InS formation.

No abstract

No abstract