α—K_3H_2SiW_9Mo_2VO_(40)·6H_2O的晶体结构  

CRYSTAL STRUCTURE OF α-K_3H_2SiW_9Mo_2VO_(40)·6H_2O

作　　者：朱建国[1] 王金晞[1] 陈荣三[1] 周忠远[2] 郁开北[2] 

机构地区：[1]南京大学配位化学研究所 [2]中国科学院成都测试中心

出　　处：《南京大学学报（自然科学版）》1990年第3期442-452,共11页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金资助课题

摘　　要：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。a-K_3H_2SiW_9Mo_2Vo_(40)·6H_2O was prepared in aqueous solution by acidification. It is hexagonal with the space group P6_2and a=b=19. 014A, c=12.459A, v=3902. 13A^3, Dc=3. 60 for z=3. The crystal contains a discrete a-SiW_9Mo_2VO_(40)^(5-) anion which is almost identical to the a-SiW_(12)_(40)^(5-) anion in shape and in size, but three tungston atoms are replaced with two molybdenum and one vanadium atoms. The metallic atoms are distributed on twelve sites. The positions of three potassium atoms and six crystal waters have been located. This crystal structure is very similar to a-K_3H_2SiW_11 VO_40·6H_2O, expcept for one position of potassium.

关 键 词：晶体结构 钨钼钒硅酸钾 晶体 

分 类 号：O741.4[理学—晶体学]