α—钨钒硅酸钾(α—K_3H_2SiW_(11)VO_(40)·6H_2O)的晶体结构

CRYSTAL STRUCTURE OF TUNGSTOVANADO-SILICATE (α-K_3H_2SiW_(11)VO_(40)·6H_2O)

α-K_H_3H_2SiW_(11)VO_(40)·6H_2O属六方晶系,空间群为P6_2,晶胞参数:α=b=19.084A,c=12.489A,V=3939.17A^3,Z=3;D_0=3.86gcm^(-3),Dm=3.81gcm^(-3)。晶体内含有分立的α-SiW_(11)VO_(40)^(5-)阴离子,其形状、大小类同于α-SiW_(12)O_(40)^(4-),仅是一个W原子为V原子所取代。一个V原子与十一个W原子呈无序分市,共占据十二个原子位置。三个K原子和六个结晶水的位置已经确定。

α-K3H2SiW11VO40·6H2O is of hexagonal system with space group P62. Its cell parameters are found to be α= b= 19.084(A), c=12.489(A), V= 3939.17(A3), Dc=3.86gcm-3, Dm = 3.81gcm-3, Z = 3. The crystal contains a discrete α-SiW11VO405- ion, which is almost identical with α-SiW12O404- anion in shape and in size but with one tungsten atom replaced by vanadium atom. The position of vanadium could not be located because of the random orientation of its group The position of the three potassium atoms and six waters of crystallization have been located.