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合成的标题化合物Ｋ８Ｈ４Ｎｂ４Ｗ８Ｏ３６（Ｏ２）４·１８Ｈ２Ｏ晶体属立方晶系，Ｐｍ３－ｍ空间群，晶胞参数ａ＝１．０６４（１）ｎｍ，Ｚ＝１，阴离子骨架呈一种高对称的全新十二聚构型。钾离子无序分布在靠近对称中心的４个相关位置
The synthesized title compound K8H4Nb4W8O36 (O2) 4 .18H2O has cubic crystal system and Pm3-m space group with unit cell parameters of a = 1.064 (1) nm and Z = 1. The anion skeleton exhibits a highly symmetrical new ten Dimerization configuration. Potassium ions are disordered in 4 related positions near the center of symmetry