A new tantalate compound KSr 2Ta 3O 10 was synthesized by solid state reaction for the first time in the ternary system K 2O SrO Ta 2O 5, and its single crystals were prepared using flux method. The chemical compositi...A new tantalate compound KSr 2Ta 3O 10 was synthesized by solid state reaction for the first time in the ternary system K 2O SrO Ta 2O 5, and its single crystals were prepared using flux method. The chemical compositions, crystal structure, optical property, density and melting point of the new compound were characterized by EPMA, XRD, DTA and so on. KSr 2Ta 3O 10 crystallizes the orthorhombic system with unit cell parameters a= 0.784 4(1) nm, b =0.777 0(1) nm, c =3.012 7(1) nm and space group P 2 12 12 1, Z =8. The structure may be described as treble perovskite sheets [Sr 2Ta 3O 10 ] - interleaved with K +. Further, it was found that KSr 2Ta 3O 10 has intercalation phenomenon. Na +, Li +, H +, NH + 4 could exchange the interlayer cations K + of KSr 2Ta 3O 10 , and n hexylamine also could intercalate into the place between the layers of [Sr 2Ta 3O 10 ] -. [WT5HZ]展开更多
先用苯萃取孔雀石绿和氟钽酸的缔合物,然后用丁基罗丹明 B 交换缔合物中的孔雀石绿,用荧光光度法可以测定低至0.07μg 的钽。钽的浓度在0.07～2.0μg/5ml 范围内,荧光强度与其浓度成正比。本法研究了含氧有机溶剂对荧光强度的影响,并测...先用苯萃取孔雀石绿和氟钽酸的缔合物,然后用丁基罗丹明 B 交换缔合物中的孔雀石绿,用荧光光度法可以测定低至0.07μg 的钽。钽的浓度在0.07～2.0μg/5ml 范围内,荧光强度与其浓度成正比。本法研究了含氧有机溶剂对荧光强度的影响,并测定了溶剂化数和溶剂化常数。此法适用于纯氧化铌和钢样中痕量钽的测定。展开更多
文摘A new tantalate compound KSr 2Ta 3O 10 was synthesized by solid state reaction for the first time in the ternary system K 2O SrO Ta 2O 5, and its single crystals were prepared using flux method. The chemical compositions, crystal structure, optical property, density and melting point of the new compound were characterized by EPMA, XRD, DTA and so on. KSr 2Ta 3O 10 crystallizes the orthorhombic system with unit cell parameters a= 0.784 4(1) nm, b =0.777 0(1) nm, c =3.012 7(1) nm and space group P 2 12 12 1, Z =8. The structure may be described as treble perovskite sheets [Sr 2Ta 3O 10 ] - interleaved with K +. Further, it was found that KSr 2Ta 3O 10 has intercalation phenomenon. Na +, Li +, H +, NH + 4 could exchange the interlayer cations K + of KSr 2Ta 3O 10 , and n hexylamine also could intercalate into the place between the layers of [Sr 2Ta 3O 10 ] -. [WT5HZ]
文摘先用苯萃取孔雀石绿和氟钽酸的缔合物,然后用丁基罗丹明 B 交换缔合物中的孔雀石绿,用荧光光度法可以测定低至0.07μg 的钽。钽的浓度在0.07～2.0μg/5ml 范围内,荧光强度与其浓度成正比。本法研究了含氧有机溶剂对荧光强度的影响,并测定了溶剂化数和溶剂化常数。此法适用于纯氧化铌和钢样中痕量钽的测定。
