Hf_(2+x)Mo_(3-x)Si_4(x=0.3)的合成、晶体结构及成键特性; Synthesis, Structure and Bonding Features of Hf 2+x Mo 3-x Si 4 (x=0.3) | |
宋明虎 ; 毛少瑜 ; 宓锦校 ; 赵景泰 | |
1999 | |
关键词 | 晶体结构 金属间化物 过渡金属 过渡成键 Crystal structure Intermetallic compound Transition metal Transitional bond |
英文摘要 | 电弧熔炼方法合成了Hf2+XMO3-XSI4(X=0.3),单晶X射线衍射方法测定了晶体结构.化学式,Hf2.3(2)MO2.7(2)SI4,Mr=781.9,晶体学及结构参数:正交晶系,CE2SC3SI4类型,(62)PnMA,A=0.6579(1),b=1.2818(4),C=0.6778(1)nM,V=0.5716(1)nM3,z=4,dX=9.084g/CM3,μ=501.55CM-1(λMOkα=0.07107nM),f(000)=1340,T=296k,对于25个修正参数和637个独立可观察衍射点r=0.075,Wr=0.068.此结构中,SI原子两两成键联接成哑铃状,MO原子均处于SI原子所形成的配位畸变八面体中心,这些配位八面体最终联接形成三维MO-SI网络,Hf原子则散布在网络之间沿[100]方向的隧道中.此化合物组成和结构不符合价键规律,成键具有过渡性且原子的配位环境遵守此类化合物规律.; Hf 2+x Mo 3-x Si 4 (x=0.3) was synthesized by arcmelting method and its crystal structure was characterized by single crystal XRD method.Crystallographic and refined structure parameters are: formula, Hf 2.3(2) Mo 2.7(2) Si 4 , Mr =781.9, orthorhombic,Ce 2Sc 3Si 4 type,(62) Pnma, a =0.657 9(1), b =1.281 8(4) , c =0.677 8(1) nm, V =0.571 6(1) nm 3, Z =4, D x =9.08 4 g/cm 3, μ =501.55 cm -1 ( λ MoKα=0.07107 nm), F (000)=134 0, T =296 K, R =0.075 and wR= 0.068 for 25 refined parameters and 637 contributing independent observed reflections.The structure is characterized by bonded Si-Si dumbbells.The Mo atoms are coordinated by deformed Si octahedra which form three dimensional net by connection.The Hf atoms are distributed in tunnels along direction.The compound is not a valence compound since bonds have typical transitional features.General coordination environment rules are followed.; 国家自然科学青年基金;国家教委优秀年青教师基金 |
语种 | zh_CN |
内容类型 | 期刊论文 |
源URL | [http://dspace.xmu.edu.cn/handle/2288/98531] ![]() |
专题 | 材料学院-已发表论文 |
推荐引用方式 GB/T 7714 | 宋明虎,毛少瑜,宓锦校,等. Hf_(2+x)Mo_(3-x)Si_4(x=0.3)的合成、晶体结构及成键特性, Synthesis, Structure and Bonding Features of Hf 2+x Mo 3-x Si 4 (x=0.3)[J],1999. |
APA | 宋明虎,毛少瑜,宓锦校,&赵景泰.(1999).Hf_(2+x)Mo_(3-x)Si_4(x=0.3)的合成、晶体结构及成键特性.. |
MLA | 宋明虎,et al."Hf_(2+x)Mo_(3-x)Si_4(x=0.3)的合成、晶体结构及成键特性".(1999). |
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