A series of crystals of Ba_(x)Sr_(1-x)(NO_(3))_(2) (x=0-0.98) were grown from aqueous solutions by the evaporation method and characterized by x-ray powder diffraction and high resolution x-ray diffraction. All diffra...A series of crystals of Ba_(x)Sr_(1-x)(NO_(3))_(2) (x=0-0.98) were grown from aqueous solutions by the evaporation method and characterized by x-ray powder diffraction and high resolution x-ray diffraction. All diffraction data are well indexed according to simple cubic structure. The variation of lattice constants with the concentrations of Ba^(2+) in the crystals accorded quite well to the Vegard's Law. The results of high-resolution x-ray diffraction show that the crystalline quality of Ba_(x)Sr_(1-x)(NO_(3))_(2) decreases with x increasing. The distribution of Ba^(2+) between the solution and solid phase indicated that Ba^(2+) is enriched in the solid phase. It could be attributed to the solubility of Ba(NO3)2 in water being less than that of Sr(NO_(3))_(2).展开更多
基金Supported by the Climbing Project of National Commission of Science and Technology(95-Yu-34).
文摘A series of crystals of Ba_(x)Sr_(1-x)(NO_(3))_(2) (x=0-0.98) were grown from aqueous solutions by the evaporation method and characterized by x-ray powder diffraction and high resolution x-ray diffraction. All diffraction data are well indexed according to simple cubic structure. The variation of lattice constants with the concentrations of Ba^(2+) in the crystals accorded quite well to the Vegard's Law. The results of high-resolution x-ray diffraction show that the crystalline quality of Ba_(x)Sr_(1-x)(NO_(3))_(2) decreases with x increasing. The distribution of Ba^(2+) between the solution and solid phase indicated that Ba^(2+) is enriched in the solid phase. It could be attributed to the solubility of Ba(NO3)2 in water being less than that of Sr(NO_(3))_(2).
