Citation: Zhang Bin, Wang Zhe-Min, Liu Shi-Xiong, Huang Jin-Ling. Synthesis and Crystal Structure of a New Metal-rich Layered Ternary Tantalum Telluride TaNi2Te2[J]. Acta Physico-Chimica Sinica, 1994, 10(06): 508-513. doi: 10.3866/PKU.WHXB19940606
新的富金属三组元层状碲化物TaNi2Te2的合成和晶体结构
通过高温固相反应合成了标题化合物并测定了其晶体结构．结晶学参数：正交晶系，空间群Pnma，Z＝4，α＝0.6480(1)；b＝0.35639(6)，c＝1.6994(4) nm，V＝0.3925(1) nm，D_c＝9.37 g·cm~(-3)，λ(MoK_α)＝0.071069 nm，μ(MoK_α)＝514.43 cm~(－1)，F(000)＝932，最终偏离因子R＝0.051．TaNi_2Te_2是一新的富金属三级元层状碲化物，在结构中两层金属原子夹于碲原子层之间，形成对Ta原子的平面三角形碲配位和对Ni原子的三角锥碲配位．演化合物的一个重要结构特征是平面形的五元环TeNi_4孪合形成扩展结构而每个Ta原子夹于两个TeNi_4五元环之间．
English
Synthesis and Crystal Structure of a New Metal-rich Layered Ternary Tantalum Telluride TaNi2Te2
The title compound has been synthesised by high-temperature solid state reaction. The crystal structure was determined by single crystal X-ray diffraction method. The crystal belongs to orthorhombic system with space group Pnma, Z=4, α=0.6480(1), b=0.35639(6), c=1.6994(4) nm, V=0.3925(1) nm, D_c=9.37 g·cm~(-3), λ(MoK_α)=0.071069 nm, μ(MoK_α)=514.43 cm~(-1) and F(000)=932. The final R is 0.051 for 706 observations. TaNi_2Te_2 is a new metal-rich layered ternary telluride. In the structure two metal sheets are sandwiched below and above by Te layers, leading to planar tri nal coordination for Ta and tri nal pyramidic coordination for Ni by Te atoms. An important structural character of this compound is that all planar five-member TeNi_4 rings are fused together to form an extended structure, and each Ta atom is sandwiched by two TeNi_4 rings.
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Key words:
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Ternary layered telluride
- / Crystal structure
- / Synthesis
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