Anatase

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https://term.museum-digital.de/md-de/tag/55130
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Anatase is a metastable mineral form of titanium dioxide (TiO2) with a tetragonal crystal structure. Although colorless or white when pure, anatase in nature is usually a black solid due to impurities. Three other polymorphs (or mineral forms) of titanium dioxide are known to occur naturally: brookite, akaogiite, and rutile, with rutile being the most common and most stable of the bunch. Anatase is formed at relatively low temperatures and found in minor concentrations in igneous and metamorphic rocks. Thin films of TiO2-coated glass show antifogging and self-cleaning properties under ultraviolet radiation.
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  • Anatáz

    Anatáz

    Max. 1,2 cm-es, sötétszürke,...

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

  • Anatáz

    Anatáz

    Mm alatti, barna,...

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

  • Fluorit, anatáz

    Fluorit, anatáz

    Fluorit: mm-es, színtelen...

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

  • Anatáz

    Anatáz

    Mm alatti kékes dipiramisok

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

  • Anatáz

    Anatáz

    Mm alatti kristályok

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

References

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Broader (Generic)