【摘要】 本文用X射线粉末法测定了Li₂K（IO₃）₃与Li₂NH₄（IO₃）₃的晶体结构和原子参数。发现Li₃K（IO₃）₃,Li₂NH₄（IO₃）₃与Li₂Rb（IO₃）₃同晶型,属单斜晶系,空间群为P2₁/α,每个单胞含有四个化合式量。室温的点阵常数分别为α=11.198A,b=11.046A,c=8.254A,β=111.53°,及α=11.327A,b=11.078A,c=8.341A,β=111.87°。讨论了二元化合物的形成与离子半径的关系。更多还原

【Abstract】 The crystal structure and the atomic parameters of Li2K(IO3)3 and Li2NH4(IO3)3 have been determined by means of the X-ray powder diffraction method. The Li2K(IO3)3 and Li2NH4(IO3)3 are isomorphic with Li2Rb(IO3)3. The unit cell is monoclinic. The space group is P21/α. There are four formula units per unit cell. Lattice parameters are α= 11.198 A, b? = 11.046 A, c = 8.254 A, β= 111.53° and α =11.327 A, b = 11.078 A, c = 8.341 A,β = 111.87° respectively. The relation between formation of Li2M(IO3)3 compounds and Mionic radius has been discussed.更多还原