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Mineral formation from aqueous solution, part II. The stability of langite, Cu4So4(OH)6 · H2O

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Summary

Naturally occurring waters in the vicinity of complex Cu orebodies have been collected where they are responsible for the precipitation of solid langite, Cu4SO4(OH)6 · H2O, and malachite, Cu2CO3(OH)2. The solutions were analysed and from computer fitting of results the solubility product of langite has been calculated as log Ksp=−17.3 (0.2). This value has enabled the stability field of langite to be estimated and the relationship of this compound to other basic cupric sulphates is discussed.

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References

  1. (1)

    W. Feitknecht and P. Schindler,Pure Appl. Chem., 6, 128 (1963).

  2. (2)

    C. Palache, H. Berman and C. Frondel,The System of Mineralogy of J. D. Dana and E. S. Dana, 7th Edit., Wiley, New York, 1951.

  3. (3)

    J. L. Proust,Ann. de Chimie, 32, 26 (1800).

  4. (4)

    J. J. Berzelius,Ann. Ch. Gilbert, 40, 289 (1812);Ann. Phys. Chem., 7, 37 (1826).

  5. (5)

    D. T. Rickard,Stockholm Contributions to Geol., 23, 1 (1970).

  6. (6)

    O. Binder,Compt. rend., 198, 653 (1934);Compt. rend., 198, 2167 (1934).

  7. (7)

    A. K. Alwan and P. A. Williams,Transition Metal Chem., 78/104.

  8. (8)

    H. G. Dines,The Metalliferous Mining Region of South-West England, H.M.S.O., London, 1956, 2 vols.

  9. (9)

    W. H. Huang and W. D. Johns,Anal. Chim. Acta, 37, 508 (1967).

  10. (10)

    D. D. Perrin and I. G. Sayce,Talanta, 14, 833 (1967).

  11. (11)

    A. H. Truesdell and B. F. Jones,J. Res. U. S. Geol. Surv., 2, 238(1974).

  12. (12)

    A. Zirino and S. Yamamoto,Limn. Ocean., 17, 661 (1972).

  13. (13)

    A. W. Mann and R. L. Deutscher,Chem. Geol., 19, 253 (1977).

  14. (14)

    J. Vuceta and J. J. Morgan,Limn. Ocean., 22, 742 (1977).

  15. (15)

    C. E. Baes Jr. and R. E. Mesmer,The Hydrolysis of Cations, Wiley, New York, 1976.

  16. (16)

    D. D. Wagman, W. H. Evans, V. B. Parker, I. Halow, S. M. Bailey and R. H. Schumm,Technical Note 270-4, National Bureau of Standards (1969) andTechnical Note 270-3, National Bureau of Standards (1968), U. S. Dept. of Commerce, U.S. Govt. Printing Office, Washington D. C.

  17. (17)

    J. J. Morgan, in S. D. Faust and J. V. Hunter (eds.),Principles and Applications of Water Chemistry, Wiley, New York, 1967.

  18. (18)

    H. E. Barner and R. V. Scheuerman,Handbook of Thermochemical Data for Compounds and Aqueous Species, Wiley, New York, 1978.

  19. (19)

    R. M. Garrels and C. L. Christ,Solutions Minerals and Equilibria, Harper and Row, New York, 1965.

  20. (20)

    E. Posnjak and G. Tunell,Am. J. Sci., 18, 1 (1929).

  21. (21)

    H. B. Weiser, W. O. Milligan and E. L. Cook,J. Am. Chem. Soc., 64, 503 (1942).

  22. (22)

    M. H. Hey,An Index of Mineral Species and Varieties, British Museum, London, 1950.

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Author information

Correspondence to Peter A. Williams.

Additional information

Part I. A. K Alawn and P. A Williams,Transition Met. Chem., 78/104

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Alwan, A.K., Williams, P.A. Mineral formation from aqueous solution, part II. The stability of langite, Cu4So4(OH)6 · H2O. Transition Met Chem 4, 319–322 (1979). https://doi.org/10.1007/BF00618325

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Keywords

  • Precipitation
  • Sulphate
  • Physical Chemistry
  • Aqueous Solution
  • Inorganic Chemistry