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    Item type:Thesis, Access status: Restricted ,
    Charakterystyka roztworów stałych szultenitu $PbHAsO_{4}$ - $PbHPO_{4}$
    (Data obrony: 2012-09-25) Zembal, Izabela
    Wydział Geologii, Geofizyki i Ochrony Środowiska
    Schultenite $PbHAsO_{4}$ - $PbHPO_{4}$ solid solution series at room temperature and pH 2 were synthesized. Analysis of the phases composition by XRD showed characteristic peaks shift towards into higher values of d, as a result of larger size ionic radius of As than P. Infrared spectroscopy showed extensive substitution of the $(AsO_{4}){^{3-}}$ group by $(PO_{4}){^{3-}}$. Characteristic stretching (v3) and bending (v4) vibrations of the schultenite solid solutions occur in the regions 740–1015 $cm^{-1}$ and 460–560 $cm^{-1}$. PbHPO4 was dissolved in bigger amount than $PbHAsO_{4}$. Formation of the secondary mineral phase after dissolution $PbHPO_{4}$ reaction was confirmed by microphotography SEM. Value of the log KSP of the $PbHAsO_{4}$ equals = -11,52.