Aluminite

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https://term.museum-digital.de/md-de/tag/56092
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"Aluminite is a hydrous aluminium sulfate mineral with formula: Al2SO4(OH)4·7H2O. It is an earthy white to gray-white monoclinic mineral which almost never exhibits crystal form. It forms botryoidal to mammillary clay-like masses. It has a very soft Mohs hardness of 1–2 and a specific gravity of 1.66–1.82.

It forms in clay and lignite deposits as an oxidation product of pyrite and marcasite along with aluminium silicates. It also occurs in volcanic sublimates, in native sulfur deposits and rarely in caves. It occurs in association with basaluminite, gibbsite, epsomite, gypsum, celestine, dolomite and goethite." - (en.wikipedia.org 21.03.2024)
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  • Aluminit

    Aluminit

    Piszkosfehér, gömbös-vesés...

    Object information
    Image: Herman Ottó Múzeum - CC BY-NC-SA

  • Aluminit

    Aluminit

    Fehér földes, vesés...

    Object information
    Image: Herman Ottó Múzeum - CC BY-NC-SA

  • Aluminit

    Aluminit

    Fehér, fénytelen, kerekded...

    Object information
    Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA

  • Aluminit

    Aluminit

    Fehér gömbös-vesés gumók

    Object information
    Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA

  • Aluminit

    Aluminit

    5-8 cm-es fehér karfiolszerű

    Object information
    Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA

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