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Growth of Cu2Cl2 and Cu2Br2 on single crystal faces and polycrystalline copper during dissolution in CuSO4 + H2SO4

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Abstract

Cu2Cl2 and Cu2Br2 precipitate and crystallise in the form of triangular pyramids and dendrites when Cu is immersed in aerated, acid CuSO4 solution containing HC1 or HBr. The critical concentration of HC1 or HBr for this precipitation depends on the surface of the copper: Poly-crystalline < (110) < (100) < (111). In the deaerated solution there is no precipitation of Cu2Cl or Cu2Br2 even at a high concentration of HC1 or HBr when only preferential etching occurs.

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Authors and Affiliations

  1. Department of Chemistry, Central College, Bangalore University, Bangalore-1

    S. Nageswar & T. H. V. Setty

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  1. S. Nageswar
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  2. T. H. V. Setty
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Communicated by Prof. M. Santappa,f.a.sc.

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Nageswar, S., Setty, T.H.V. Growth of Cu2Cl2 and Cu2Br2 on single crystal faces and polycrystalline copper during dissolution in CuSO4 + H2SO4 . Proc. Indian Acad. Sci. 71, 282–287 (1970). https://doi.org/10.1007/BF03049575

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  • DOI: https://doi.org/10.1007/BF03049575

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