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Madini Nyerereite

Discussion in 'Habari na Hoja mchanganyiko' started by Leornado, Mar 14, 2011.

  1. L

    Leornado JF-Expert Member

    Mar 14, 2011
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    Madini haya yamepewa jina la baba wa taifa, safi sana.

    Nyerereite is a very rare sodium calcium carbonate mineral with formula Na2Ca(CO3)2. It forms colorless, platey pseudohexagonal orthorhombic crystals that are typically twinned. It has a specific gravity of 2.54 and indices of refraction of nα=1.511, nβ=1.533 and nγ=1.535. Nyerereite is not stable in contact with the atmosphere and rapidly breaks down. Collection specimens must be kept in a sealed argon environment.

    It was first recognized and described by J.B. Dawson from the Ol Doinyo Lengai carbonatite lavas in 1963 and named in honor of the president of Tanzania, Julius K. Nyerere (1922-1999). In the carbonatite lava it is associated with the potassium bearing gregoryite. It has also been reported from the Afrikanda alkaline intrusive complex, in the Kola Peninsula, Russia.

    from WIKI.

    RIP baba wa Taifa.