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采用水溶液中酸化法,制得,α-九钨二钼-钒硅酸钾晶体(α-K_3H_2SiW_9Mo_2VO_(40)·6H_2O)。该晶体属六方晶系,空间群为P6_2,晶胞参数为:a=b=19.014A,c=12.459A,v=3902.13A~3,z=3,Dc=3.64g/cm~3。晶体内含有分立的α-SiW_9Mo_2VO_(40)~(5-)阴离子,其形状,大小类同于后者的三个W原子为二个Mo原子和一个V原子取代,金属原子在十二个位置上无序分布。三个K原子和六个结晶水的位置得到确定。整个晶体构型与α-K_3H_2SiW_(11)VO_(40)·6H_2O十分相似,只有一个K原子的位置不同。
The aqueous solution was acidified to obtain α-9-tungsten-molybdenum-potassium vanadate crystal (α-K_3H_2SiW_9Mo_2VO_ (40) · 6H_2O). The crystal belongs to the hexagonal system, the space group is P6_2, the unit cell parameters are: a = b = 19.014A, c = 12.459A, v = 3902.13A ~ 3, z = 3, Dc = 3.64g / cm ~ 3. The crystal contains discrete α-SiW_9Mo_2VO_ (40) ~ (5) anions, the shape, size and the same three W atoms of the latter are replaced by two Mo atoms and one V atom, and the metal atoms are in the twelve positions On the disorderly distribution. The positions of the three K atoms and the six crystal water are determined. The crystal structure is very similar to α-K_3H_2SiW_ (11) VO_ (40) · 6H_2O, with only one K atom being located at different positions.