酒石酸根离子控制锑白粉末结构形貌的模板作用行为

采用中和转化法制备锑白(Sb₂O₃),并用XRD,IR和SEM等方法分析测试了产物结构形貌.从结晶化学角度,结合负离子配位多面体生长基元理论探讨了酒石酸根离子对锑白结构形貌的控制规律.认为酒石酸根离子的强配位能力使溶液中生长基元由SbO₃E配位四面体转化为SbO³⁺³E星状配位体是立方晶型锑白形成的主要原因.

Template Effect of Tartrate Ion on the Morphology of Antimony Trioxide

This paper describes the influence of tartrate ions on the crystal growth and morphology of antimony white(Sb_2O_3), which was characterized by XRD, IR and SEM. The relationship between the orientation of tartrate ions and the morphology of Sb_2O_3 was studied from the standpoint of crystal chemistry, and the formation mechanism of Sb_2O_3 with different morphologies was analyzed according to the theoretical model of the growth units with coordinative polyhedron structure of anion. It revealed that the products transformed from the orthombic Sb_2O_3 to the cubic Sb_2O_3 due to the molecular recognition of tartrate anion with a strong coordination ability, which changed the original growth unit of SbO_3E coordinative tetrahedron into the growth unit of SbO_ 3+3E stellar quadrangle.