Compositional segregation and solid solution in the lead-dominant alunite-type minerals from Broken Hill, N.S.W.

K. J. Rattray, M. R. Taylor, D. J M Bevan, A. Pring

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    36 Citations (Scopus)

    Abstract

    A study of the composition and unit cell data of a suite of lead-rich minerals of the alunite-jarosite group from the oxidized zone of the ore body at Broken Hill, New South Wales, Australia, has revealed almost complete XO4 (X = As, P. S) solid solution in these minerals at this deposit. The species in the group noted are hidalgoite, hinsdalite, beudantite, segnitite and plumbogummite. These minerals at Broken Hill exhibit a number of growth textures, including oscillatory zoning, colloform handing and replacements. Zoning in these minerals is due to the segregation of Al- and Fe-rich members, and compositions indicate a strong coupling of Fe3+ with AsO43- and Al with PO43-.

    Original languageEnglish
    Pages (from-to)779-785
    Number of pages7
    JournalMineralogical Magazine
    Volume60
    Issue number402
    DOIs
    Publication statusPublished - 1 Oct 1996

    Keywords

    • Alunite-type minerals
    • Australia
    • Broken Hill
    • Hidalgoite
    • Plumbogummite
    • Segregation
    • Solid-solution

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