The title complex is of triclinic system space group P1 with its cell parameters: a = 9. 386(1), b = 9. 412(2), c=11. 549(2)(?), α=97. 91(2), β = 81.70(1), γ= 102. 63(1)°, V= 979.2(?)3, Z = l, Mr = 966. 01, Dx...The title complex is of triclinic system space group P1 with its cell parameters: a = 9. 386(1), b = 9. 412(2), c=11. 549(2)(?), α=97. 91(2), β = 81.70(1), γ= 102. 63(1)°, V= 979.2(?)3, Z = l, Mr = 966. 01, Dx =1. 638 gcm-3, μ(MoKα) = 16. 896cm-1, F (000) = 478, final R = 0. 033 and Rw = 0. 046 for 3424 reflections with I≥3σ(I). The two O atoms of the ligand are bonded to two Sn atoms to form a bridged binuclear species which lies on the crystallographic centre of symmetry situated at the centre of the ethylene C -C bond. The unique Sn atom exhibits a trigonalbipyramidal geometry.展开更多
The effect of temperature, soak times, carbon and addition on composites was discussed in the process ofsynthesizing O'-sialon-SiC by carbonthermal reduction-nitration from nature kaolin. It showed that the fractu...The effect of temperature, soak times, carbon and addition on composites was discussed in the process ofsynthesizing O'-sialon-SiC by carbonthermal reduction-nitration from nature kaolin. It showed that the fracturestrength (MOR) of composites sintered under certain conditions can be up to 140MPa at room temperature. Thetarget parameter optima regions with good mechanical properties of this material were also indicated by usingcomputer pattern recognition program.展开更多
基金Project supported by the National Foundation of Natural Sciences.
文摘The title complex is of triclinic system space group P1 with its cell parameters: a = 9. 386(1), b = 9. 412(2), c=11. 549(2)(?), α=97. 91(2), β = 81.70(1), γ= 102. 63(1)°, V= 979.2(?)3, Z = l, Mr = 966. 01, Dx =1. 638 gcm-3, μ(MoKα) = 16. 896cm-1, F (000) = 478, final R = 0. 033 and Rw = 0. 046 for 3424 reflections with I≥3σ(I). The two O atoms of the ligand are bonded to two Sn atoms to form a bridged binuclear species which lies on the crystallographic centre of symmetry situated at the centre of the ethylene C -C bond. The unique Sn atom exhibits a trigonalbipyramidal geometry.
文摘The effect of temperature, soak times, carbon and addition on composites was discussed in the process ofsynthesizing O'-sialon-SiC by carbonthermal reduction-nitration from nature kaolin. It showed that the fracturestrength (MOR) of composites sintered under certain conditions can be up to 140MPa at room temperature. Thetarget parameter optima regions with good mechanical properties of this material were also indicated by usingcomputer pattern recognition program.