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钨酸铅 (PbWO4 )晶体结构可看作是钨氧四面体WO4 与铅离子Pb2 +的有序结合 .根据“生长基元”模型 ,钨酸铅晶体的生长基元是由钨氧四面体和铅离子有序结合而成的具有不同几何结构的聚集体 .棱锥体状、四方柱状和四棱柱状生长基元是钨酸铅晶体的有利生长基元 .这些有利生长基元的几何构型与钨酸铅晶体结晶学单形的几何方位相一致 .在低受限度生长条件下 ,钨酸铅晶粒的生长形态是这些有利生长基元几何构型的聚合 .这些结论完全被水热法制备实验结果证实 .
The crystal structure of lead tungstate (PbWO4) can be regarded as the ordered combination of tungsten tetrahedra (WO4) and lead ion (Pb2 +). According to the “growth primitive” model, the growth primitive of lead tungstate crystal is composed of tungsten oxy tetrahedron and Lead ions are ordered to form aggregates with different geometries.The pyramidal, tetragonal and prismatic growth motifs are favorable growth motifs for lead tungstate crystals.The geometries of these favorable growth motifs are related to The geometric orientations of the crystallographic single crystals of lead tungstate crystals are consistent. Under low-constrained growth conditions, the growth morphology of lead tungstate grains is the polymerization of these favorable growth element geometries.These conclusions were completely obtained by hydrothermal method Experimental results confirmed.