Synthesis, Characterization, and Crystal Structure Analysis of New Mixed Metal Sulfate NaPr(SO4)2(H2O)

Resumo

A crystalline mixed-metal sulfate compound NaPr(SO₄)₂(H₂O) is synthesized under hydrothermal conditions and thoroughly characterized. Sodium bisulfite (NaHSO₃) and piperazine are used with praseodymium acetate to obtain this sulfate-based structure. The single crystal structural analysis shows that the compound has the NaCe(SO₄)₂ · H₂O structure type and crystallizes in the trigonal space group P3₂21 (No. 154) with a = 6.9872(2) Å, c = 12.8935(8) Å, and V = 545.14(4) ų. The compound has three-dimensional connectivity formed by the sulfate units with Pr and Na centers. Tricapped trigonal prismatic PrO₉ units and square-antiprismatic NaO₈ units link to the SO₄ tetrahedron for building the three-dimensional structure. The compound is also characterized by PXRD, TGA, and FT-IR spectroscopy. The present study illustrates the usefulness of the bisulfite anion and secondary amine for the chiral structure building.